@type t() :: %Envoy.Api.V2.Core.ApiConfigSource{
__unknown_fields__: [
{field_number :: integer(), Protobuf.Wire.Types.wire_type(),
value :: term()}
],
api_type: Envoy.Api.V2.Core.ApiConfigSource.ApiType.t(),
cluster_names: [String.t()],
grpc_services: [Envoy.Api.V2.Core.GrpcService.t()],
rate_limit_settings: Envoy.Api.V2.Core.RateLimitSettings.t() | nil,
refresh_delay: Google.Protobuf.Duration.t() | nil,
request_timeout: Google.Protobuf.Duration.t() | nil,
set_node_on_first_message_only: boolean(),
transport_api_version: Envoy.Api.V2.Core.ApiVersion.t()
}