defmodule Kayrock.FindCoordinator do
  @api :find_coordinator
  @moduledoc "Kayrock-generated module for the Kafka `#{@api}` API
"
  _ = " THIS CODE IS GENERATED BY KAYROCK"

  (
    @vmin 0
    @vmax 3
  )

  defmodule V0.Request do
    @vsn 0
    @api :find_coordinator
    @schema key: :string
    @moduledoc "Kayrock-generated request struct for Kafka `#{@api}` v#{@vsn} API
messages

The schema of this API is
```
#{inspect(@schema, pretty: true)}
```
"
    _ = " THIS CODE IS GENERATED BY KAYROCK"
    defstruct key: nil, correlation_id: nil, client_id: nil
    import Elixir.Kayrock.Serialize
    @typedoc "Request struct for the Kafka `#{@api}` API v#{@vsn}
"
    @type t :: %__MODULE__{
            key: nil | binary(),
            correlation_id: nil | integer(),
            client_id: nil | binary()
          }
    @doc "Returns the Kafka API key for this API"
    @spec api_key :: integer
    def api_key do
      Kayrock.KafkaSchemaMetadata.api_key(:find_coordinator)
    end

    @doc "Returns the API version (#{@vsn}) implemented by this module"
    @spec api_vsn :: integer
    def api_vsn do
      0
    end

    @doc "Returns a function that can be used to deserialize the wire response from the\nbroker for this message type\n"
    @spec response_deserializer :: (binary -> {V0.Response.t(), binary})
    def response_deserializer do
      &V0.Response.deserialize/1
    end

    @doc "Returns the schema of this message\n\nSee [above](#).\n"
    @spec schema :: term
    def schema do
      [key: :string]
    end

    @doc "Serialize a message to binary data for transfer to a Kafka broker"
    @spec serialize(t()) :: iodata
    def serialize(%V0.Request{} = struct) do
      [
        <<api_key()::16, api_vsn()::16, struct.correlation_id::32>>,
        case struct.client_id do
          nil -> <<-1::16-signed>>
          id -> <<byte_size(id)::16, id::binary>>
        end,
        [serialize(:string, Map.fetch!(struct, :key))]
      ]
    end
  end

  defimpl(Elixir.Kayrock.Request, for: V0.Request) do
    def serialize(%V0.Request{} = struct) do
      try do
        V0.Request.serialize(struct)
      rescue
        e -> reraise Kayrock.InvalidRequestError, {e, struct}, __STACKTRACE__
      end
    end

    def api_vsn(%V0.Request{}) do
      V0.Request.api_vsn()
    end

    def response_deserializer(%V0.Request{}) do
      V0.Request.response_deserializer()
    end
  end

  defmodule V1.Request do
    @vsn 1
    @api :find_coordinator
    @schema key: :string, key_type: :int8
    @moduledoc "Kayrock-generated request struct for Kafka `#{@api}` v#{@vsn} API
messages

The schema of this API is
```
#{inspect(@schema, pretty: true)}
```
"
    _ = " THIS CODE IS GENERATED BY KAYROCK"
    defstruct key: nil, key_type: nil, correlation_id: nil, client_id: nil
    import Elixir.Kayrock.Serialize
    @typedoc "Request struct for the Kafka `#{@api}` API v#{@vsn}
"
    @type t :: %__MODULE__{
            key: nil | binary(),
            key_type: nil | integer(),
            correlation_id: nil | integer(),
            client_id: nil | binary()
          }
    @doc "Returns the Kafka API key for this API"
    @spec api_key :: integer
    def api_key do
      Kayrock.KafkaSchemaMetadata.api_key(:find_coordinator)
    end

    @doc "Returns the API version (#{@vsn}) implemented by this module"
    @spec api_vsn :: integer
    def api_vsn do
      1
    end

    @doc "Returns a function that can be used to deserialize the wire response from the\nbroker for this message type\n"
    @spec response_deserializer :: (binary -> {V1.Response.t(), binary})
    def response_deserializer do
      &V1.Response.deserialize/1
    end

    @doc "Returns the schema of this message\n\nSee [above](#).\n"
    @spec schema :: term
    def schema do
      [key: :string, key_type: :int8]
    end

    @doc "Serialize a message to binary data for transfer to a Kafka broker"
    @spec serialize(t()) :: iodata
    def serialize(%V1.Request{} = struct) do
      [
        <<api_key()::16, api_vsn()::16, struct.correlation_id::32>>,
        case struct.client_id do
          nil -> <<-1::16-signed>>
          id -> <<byte_size(id)::16, id::binary>>
        end,
        [
          serialize(:string, Map.fetch!(struct, :key)),
          serialize(:int8, Map.fetch!(struct, :key_type))
        ]
      ]
    end
  end

  defimpl(Elixir.Kayrock.Request, for: V1.Request) do
    def serialize(%V1.Request{} = struct) do
      try do
        V1.Request.serialize(struct)
      rescue
        e -> reraise Kayrock.InvalidRequestError, {e, struct}, __STACKTRACE__
      end
    end

    def api_vsn(%V1.Request{}) do
      V1.Request.api_vsn()
    end

    def response_deserializer(%V1.Request{}) do
      V1.Request.response_deserializer()
    end
  end

  defmodule V2.Request do
    @vsn 2
    @api :find_coordinator
    @schema key: :string, key_type: :int8
    @moduledoc "Kayrock-generated request struct for Kafka `#{@api}` v#{@vsn} API
messages

The schema of this API is
```
#{inspect(@schema, pretty: true)}
```
"
    _ = " THIS CODE IS GENERATED BY KAYROCK"
    defstruct key: nil, key_type: nil, correlation_id: nil, client_id: nil
    import Elixir.Kayrock.Serialize
    @typedoc "Request struct for the Kafka `#{@api}` API v#{@vsn}
"
    @type t :: %__MODULE__{
            key: nil | binary(),
            key_type: nil | integer(),
            correlation_id: nil | integer(),
            client_id: nil | binary()
          }
    @doc "Returns the Kafka API key for this API"
    @spec api_key :: integer
    def api_key do
      Kayrock.KafkaSchemaMetadata.api_key(:find_coordinator)
    end

    @doc "Returns the API version (#{@vsn}) implemented by this module"
    @spec api_vsn :: integer
    def api_vsn do
      2
    end

    @doc "Returns a function that can be used to deserialize the wire response from the\nbroker for this message type\n"
    @spec response_deserializer :: (binary -> {V2.Response.t(), binary})
    def response_deserializer do
      &V2.Response.deserialize/1
    end

    @doc "Returns the schema of this message\n\nSee [above](#).\n"
    @spec schema :: term
    def schema do
      [key: :string, key_type: :int8]
    end

    @doc "Serialize a message to binary data for transfer to a Kafka broker"
    @spec serialize(t()) :: iodata
    def serialize(%V2.Request{} = struct) do
      [
        <<api_key()::16, api_vsn()::16, struct.correlation_id::32>>,
        case struct.client_id do
          nil -> <<-1::16-signed>>
          id -> <<byte_size(id)::16, id::binary>>
        end,
        [
          serialize(:string, Map.fetch!(struct, :key)),
          serialize(:int8, Map.fetch!(struct, :key_type))
        ]
      ]
    end
  end

  defimpl(Elixir.Kayrock.Request, for: V2.Request) do
    def serialize(%V2.Request{} = struct) do
      try do
        V2.Request.serialize(struct)
      rescue
        e -> reraise Kayrock.InvalidRequestError, {e, struct}, __STACKTRACE__
      end
    end

    def api_vsn(%V2.Request{}) do
      V2.Request.api_vsn()
    end

    def response_deserializer(%V2.Request{}) do
      V2.Request.response_deserializer()
    end
  end

  defmodule V3.Request do
    @vsn 3
    @api :find_coordinator
    @schema key: :compact_string, key_type: :int8, tagged_fields: :tagged_fields
    @moduledoc "Kayrock-generated request struct for Kafka `#{@api}` v#{@vsn} API
messages

The schema of this API is
```
#{inspect(@schema, pretty: true)}
```
"
    _ = " THIS CODE IS GENERATED BY KAYROCK"
    defstruct key: "", key_type: nil, tagged_fields: [], correlation_id: nil, client_id: nil
    import Elixir.Kayrock.Serialize
    @typedoc "Request struct for the Kafka `#{@api}` API v#{@vsn}
"
    @type t :: %__MODULE__{
            key: nil | binary(),
            key_type: nil | integer(),
            tagged_fields: [{non_neg_integer(), binary()}],
            correlation_id: nil | integer(),
            client_id: nil | binary()
          }
    @doc "Returns the Kafka API key for this API"
    @spec api_key :: integer
    def api_key do
      Kayrock.KafkaSchemaMetadata.api_key(:find_coordinator)
    end

    @doc "Returns the API version (#{@vsn}) implemented by this module"
    @spec api_vsn :: integer
    def api_vsn do
      3
    end

    @doc "Returns a function that can be used to deserialize the wire response from the\nbroker for this message type\n"
    @spec response_deserializer :: (binary -> {V3.Response.t(), binary})
    def response_deserializer do
      &V3.Response.deserialize/1
    end

    @doc "Returns the schema of this message\n\nSee [above](#).\n"
    @spec schema :: term
    def schema do
      [key: :compact_string, key_type: :int8, tagged_fields: :tagged_fields]
    end

    @doc "Serialize a message to binary data for transfer to a Kafka broker"
    @spec serialize(t()) :: iodata
    def serialize(%V3.Request{} = struct) do
      [
        <<api_key()::16, api_vsn()::16, struct.correlation_id::32>>,
        case struct.client_id do
          nil -> <<-1::16-signed>>
          id -> <<byte_size(id)::16, id::binary>>
        end,
        <<0>>,
        [
          serialize(:compact_string, Map.fetch!(struct, :key)),
          serialize(:int8, Map.fetch!(struct, :key_type)),
          serialize_tagged_fields(Map.get(struct, :tagged_fields, []))
        ]
      ]
    end
  end

  defimpl(Elixir.Kayrock.Request, for: V3.Request) do
    def serialize(%V3.Request{} = struct) do
      try do
        V3.Request.serialize(struct)
      rescue
        e -> reraise Kayrock.InvalidRequestError, {e, struct}, __STACKTRACE__
      end
    end

    def api_vsn(%V3.Request{}) do
      V3.Request.api_vsn()
    end

    def response_deserializer(%V3.Request{}) do
      V3.Request.response_deserializer()
    end
  end

  (
    @doc "Returns a request struct for this API with the given version"
    @spec get_request_struct(integer) :: request_t
  )

  def get_request_struct(0) do
    %V0.Request{}
  end

  def get_request_struct(1) do
    %V1.Request{}
  end

  def get_request_struct(2) do
    %V2.Request{}
  end

  def get_request_struct(3) do
    %V3.Request{}
  end

  defmodule V0.Response do
    @vsn 0
    @api :find_coordinator
    @schema error_code: :int16, node_id: :int32, host: :string, port: :int32
    @moduledoc "Kayrock-generated response struct for Kafka `#{@api}` v#{@vsn} API
messages

The schema of this API is
```
#{inspect(@schema, pretty: true)}
```
"
    _ = " THIS CODE IS GENERATED BY KAYROCK"
    defstruct error_code: nil, node_id: nil, host: nil, port: nil, correlation_id: nil
    @typedoc "Response struct for the Kafka `#{@api}` API v#{@vsn}
"
    @type t :: %__MODULE__{
            error_code: nil | integer(),
            node_id: nil | integer(),
            host: nil | binary(),
            port: nil | integer(),
            correlation_id: integer()
          }
    import Elixir.Kayrock.Deserialize
    @doc "Returns the Kafka API key for this API"
    @spec api_key :: integer
    def api_key do
      Kayrock.KafkaSchemaMetadata.api_key(:find_coordinator)
    end

    @doc "Returns the API version (#{@vsn}) implemented by this module"
    @spec api_vsn :: integer
    def api_vsn do
      0
    end

    @doc "Returns the schema of this message\n\nSee [above](#).\n"
    @spec schema :: term
    def schema do
      [error_code: :int16, node_id: :int32, host: :string, port: :int32]
    end

    @doc "Deserialize data for this version of this API\n"
    @spec deserialize(binary) :: {t(), binary}
    def deserialize(data) do
      <<correlation_id::32-signed, rest::binary>> = data
      deserialize_field(:root, :error_code, %__MODULE__{correlation_id: correlation_id}, rest)
    end

    defp deserialize_field(:root, :error_code, acc, data) do
      {val, rest} = deserialize(:int16, data)
      deserialize_field(:root, :node_id, Map.put(acc, :error_code, val), rest)
    end

    defp deserialize_field(:root, :node_id, acc, data) do
      {val, rest} = deserialize(:int32, data)
      deserialize_field(:root, :host, Map.put(acc, :node_id, val), rest)
    end

    defp deserialize_field(:root, :host, acc, data) do
      {val, rest} = deserialize(:string, data)
      deserialize_field(:root, :port, Map.put(acc, :host, val), rest)
    end

    defp deserialize_field(:root, :port, acc, data) do
      {val, rest} = deserialize(:int32, data)
      deserialize_field(:root, nil, Map.put(acc, :port, val), rest)
    end

    defp deserialize_field(_, nil, acc, rest) do
      {acc, rest}
    end
  end

  defmodule V1.Response do
    @vsn 1
    @api :find_coordinator
    @schema throttle_time_ms: :int32,
            error_code: :int16,
            error_message: :nullable_string,
            node_id: :int32,
            host: :string,
            port: :int32
    @moduledoc "Kayrock-generated response struct for Kafka `#{@api}` v#{@vsn} API
messages

The schema of this API is
```
#{inspect(@schema, pretty: true)}
```
"
    _ = " THIS CODE IS GENERATED BY KAYROCK"

    defstruct throttle_time_ms: nil,
              error_code: nil,
              error_message: nil,
              node_id: nil,
              host: nil,
              port: nil,
              correlation_id: nil

    @typedoc "Response struct for the Kafka `#{@api}` API v#{@vsn}
"
    @type t :: %__MODULE__{
            throttle_time_ms: nil | integer(),
            error_code: nil | integer(),
            error_message: nil | binary(),
            node_id: nil | integer(),
            host: nil | binary(),
            port: nil | integer(),
            correlation_id: integer()
          }
    import Elixir.Kayrock.Deserialize
    @doc "Returns the Kafka API key for this API"
    @spec api_key :: integer
    def api_key do
      Kayrock.KafkaSchemaMetadata.api_key(:find_coordinator)
    end

    @doc "Returns the API version (#{@vsn}) implemented by this module"
    @spec api_vsn :: integer
    def api_vsn do
      1
    end

    @doc "Returns the schema of this message\n\nSee [above](#).\n"
    @spec schema :: term
    def schema do
      [
        throttle_time_ms: :int32,
        error_code: :int16,
        error_message: :nullable_string,
        node_id: :int32,
        host: :string,
        port: :int32
      ]
    end

    @doc "Deserialize data for this version of this API\n"
    @spec deserialize(binary) :: {t(), binary}
    def deserialize(data) do
      <<correlation_id::32-signed, rest::binary>> = data

      deserialize_field(
        :root,
        :throttle_time_ms,
        %__MODULE__{correlation_id: correlation_id},
        rest
      )
    end

    defp deserialize_field(:root, :throttle_time_ms, acc, data) do
      {val, rest} = deserialize(:int32, data)
      deserialize_field(:root, :error_code, Map.put(acc, :throttle_time_ms, val), rest)
    end

    defp deserialize_field(:root, :error_code, acc, data) do
      {val, rest} = deserialize(:int16, data)
      deserialize_field(:root, :error_message, Map.put(acc, :error_code, val), rest)
    end

    defp deserialize_field(:root, :error_message, acc, data) do
      {val, rest} = deserialize(:nullable_string, data)
      deserialize_field(:root, :node_id, Map.put(acc, :error_message, val), rest)
    end

    defp deserialize_field(:root, :node_id, acc, data) do
      {val, rest} = deserialize(:int32, data)
      deserialize_field(:root, :host, Map.put(acc, :node_id, val), rest)
    end

    defp deserialize_field(:root, :host, acc, data) do
      {val, rest} = deserialize(:string, data)
      deserialize_field(:root, :port, Map.put(acc, :host, val), rest)
    end

    defp deserialize_field(:root, :port, acc, data) do
      {val, rest} = deserialize(:int32, data)
      deserialize_field(:root, nil, Map.put(acc, :port, val), rest)
    end

    defp deserialize_field(_, nil, acc, rest) do
      {acc, rest}
    end
  end

  defmodule V2.Response do
    @vsn 2
    @api :find_coordinator
    @schema throttle_time_ms: :int32,
            error_code: :int16,
            error_message: :nullable_string,
            node_id: :int32,
            host: :string,
            port: :int32
    @moduledoc "Kayrock-generated response struct for Kafka `#{@api}` v#{@vsn} API
messages

The schema of this API is
```
#{inspect(@schema, pretty: true)}
```
"
    _ = " THIS CODE IS GENERATED BY KAYROCK"

    defstruct throttle_time_ms: nil,
              error_code: nil,
              error_message: nil,
              node_id: nil,
              host: nil,
              port: nil,
              correlation_id: nil

    @typedoc "Response struct for the Kafka `#{@api}` API v#{@vsn}
"
    @type t :: %__MODULE__{
            throttle_time_ms: nil | integer(),
            error_code: nil | integer(),
            error_message: nil | binary(),
            node_id: nil | integer(),
            host: nil | binary(),
            port: nil | integer(),
            correlation_id: integer()
          }
    import Elixir.Kayrock.Deserialize
    @doc "Returns the Kafka API key for this API"
    @spec api_key :: integer
    def api_key do
      Kayrock.KafkaSchemaMetadata.api_key(:find_coordinator)
    end

    @doc "Returns the API version (#{@vsn}) implemented by this module"
    @spec api_vsn :: integer
    def api_vsn do
      2
    end

    @doc "Returns the schema of this message\n\nSee [above](#).\n"
    @spec schema :: term
    def schema do
      [
        throttle_time_ms: :int32,
        error_code: :int16,
        error_message: :nullable_string,
        node_id: :int32,
        host: :string,
        port: :int32
      ]
    end

    @doc "Deserialize data for this version of this API\n"
    @spec deserialize(binary) :: {t(), binary}
    def deserialize(data) do
      <<correlation_id::32-signed, rest::binary>> = data

      deserialize_field(
        :root,
        :throttle_time_ms,
        %__MODULE__{correlation_id: correlation_id},
        rest
      )
    end

    defp deserialize_field(:root, :throttle_time_ms, acc, data) do
      {val, rest} = deserialize(:int32, data)
      deserialize_field(:root, :error_code, Map.put(acc, :throttle_time_ms, val), rest)
    end

    defp deserialize_field(:root, :error_code, acc, data) do
      {val, rest} = deserialize(:int16, data)
      deserialize_field(:root, :error_message, Map.put(acc, :error_code, val), rest)
    end

    defp deserialize_field(:root, :error_message, acc, data) do
      {val, rest} = deserialize(:nullable_string, data)
      deserialize_field(:root, :node_id, Map.put(acc, :error_message, val), rest)
    end

    defp deserialize_field(:root, :node_id, acc, data) do
      {val, rest} = deserialize(:int32, data)
      deserialize_field(:root, :host, Map.put(acc, :node_id, val), rest)
    end

    defp deserialize_field(:root, :host, acc, data) do
      {val, rest} = deserialize(:string, data)
      deserialize_field(:root, :port, Map.put(acc, :host, val), rest)
    end

    defp deserialize_field(:root, :port, acc, data) do
      {val, rest} = deserialize(:int32, data)
      deserialize_field(:root, nil, Map.put(acc, :port, val), rest)
    end

    defp deserialize_field(_, nil, acc, rest) do
      {acc, rest}
    end
  end

  defmodule V3.Response do
    @vsn 3
    @api :find_coordinator
    @schema throttle_time_ms: :int32,
            error_code: :int16,
            error_message: :compact_nullable_string,
            node_id: :int32,
            host: :compact_string,
            port: :int32,
            tagged_fields: :tagged_fields
    @moduledoc "Kayrock-generated response struct for Kafka `#{@api}` v#{@vsn} API
messages

The schema of this API is
```
#{inspect(@schema, pretty: true)}
```
"
    _ = " THIS CODE IS GENERATED BY KAYROCK"

    defstruct throttle_time_ms: nil,
              error_code: nil,
              error_message: nil,
              node_id: nil,
              host: "",
              port: nil,
              tagged_fields: [],
              correlation_id: nil

    @typedoc "Response struct for the Kafka `#{@api}` API v#{@vsn}
"
    @type t :: %__MODULE__{
            throttle_time_ms: nil | integer(),
            error_code: nil | integer(),
            error_message: nil | binary(),
            node_id: nil | integer(),
            host: nil | binary(),
            port: nil | integer(),
            tagged_fields: [{non_neg_integer(), binary()}],
            correlation_id: integer()
          }
    import Elixir.Kayrock.Deserialize
    @doc "Returns the Kafka API key for this API"
    @spec api_key :: integer
    def api_key do
      Kayrock.KafkaSchemaMetadata.api_key(:find_coordinator)
    end

    @doc "Returns the API version (#{@vsn}) implemented by this module"
    @spec api_vsn :: integer
    def api_vsn do
      3
    end

    @doc "Returns the schema of this message\n\nSee [above](#).\n"
    @spec schema :: term
    def schema do
      [
        throttle_time_ms: :int32,
        error_code: :int16,
        error_message: :compact_nullable_string,
        node_id: :int32,
        host: :compact_string,
        port: :int32,
        tagged_fields: :tagged_fields
      ]
    end

    @doc "Deserialize data for this version of this API\n"
    @spec deserialize(binary) :: {t(), binary}
    def deserialize(data) do
      <<correlation_id::32-signed, rest::binary>> = data
      {_tagged_fields, rest} = deserialize_tagged_fields(rest)

      deserialize_field(
        :root,
        :throttle_time_ms,
        %__MODULE__{correlation_id: correlation_id},
        rest
      )
    end

    defp deserialize_field(:root, :throttle_time_ms, acc, data) do
      {val, rest} = deserialize(:int32, data)
      deserialize_field(:root, :error_code, Map.put(acc, :throttle_time_ms, val), rest)
    end

    defp deserialize_field(:root, :error_code, acc, data) do
      {val, rest} = deserialize(:int16, data)
      deserialize_field(:root, :error_message, Map.put(acc, :error_code, val), rest)
    end

    defp deserialize_field(:root, :error_message, acc, data) do
      {val, rest} = deserialize(:compact_nullable_string, data)
      deserialize_field(:root, :node_id, Map.put(acc, :error_message, val), rest)
    end

    defp deserialize_field(:root, :node_id, acc, data) do
      {val, rest} = deserialize(:int32, data)
      deserialize_field(:root, :host, Map.put(acc, :node_id, val), rest)
    end

    defp deserialize_field(:root, :host, acc, data) do
      {val, rest} = deserialize(:compact_string, data)
      deserialize_field(:root, :port, Map.put(acc, :host, val), rest)
    end

    defp deserialize_field(:root, :port, acc, data) do
      {val, rest} = deserialize(:int32, data)
      deserialize_field(:root, :tagged_fields, Map.put(acc, :port, val), rest)
    end

    defp deserialize_field(:root, :tagged_fields, acc, data) do
      {val, rest} = Kayrock.Deserialize.deserialize_tagged_fields(data)
      deserialize_field(:root, nil, Map.put(acc, :tagged_fields, val), rest)
    end

    defp deserialize_field(_, nil, acc, rest) do
      {acc, rest}
    end
  end

  (
    @doc "Deserializes raw wire data for this API with the given version"
    @spec deserialize(integer, binary) :: {response_t, binary}
  )

  def deserialize(0, data) do
    V0.Response.deserialize(data)
  end

  def deserialize(1, data) do
    V1.Response.deserialize(data)
  end

  def deserialize(2, data) do
    V2.Response.deserialize(data)
  end

  def deserialize(3, data) do
    V3.Response.deserialize(data)
  end

  (
    @typedoc "Union type for all request structs for this API"
    @type request_t ::
            Kayrock.FindCoordinator.V3.Request.t()
            | Kayrock.FindCoordinator.V2.Request.t()
            | Kayrock.FindCoordinator.V1.Request.t()
            | Kayrock.FindCoordinator.V0.Request.t()
  )

  (
    @typedoc "Union type for all response structs for this API"
    @type response_t ::
            Kayrock.FindCoordinator.V3.Response.t()
            | Kayrock.FindCoordinator.V2.Response.t()
            | Kayrock.FindCoordinator.V1.Response.t()
            | Kayrock.FindCoordinator.V0.Response.t()
  )

  (
    @doc "Returns the minimum version of this API supported by Kayrock (#{@vmin})"
    @spec min_vsn :: integer
    def min_vsn do
      0
    end
  )

  (
    @doc "Returns the maximum version of this API supported by Kayrock (#{@vmax})"
    @spec max_vsn :: integer
    def max_vsn do
      3
    end
  )
end