Wasmex.Instance.wasi_from_bytes

You're seeing just the function wasi_from_bytes, go back to Wasmex.Instance module for more information.
Link to this function

wasi_from_bytes(bytes, imports, wasi)

Specs

wasi_from_bytes(binary(), %{optional(binary()) => (... -> any())}, %{
  optional(:args) => [String.t()],
  optional(:env) => %{required(String.t()) => String.t()},
  optional(:stdin) => Wasmex.Pipe.t(),
  optional(:stdout) => Wasmex.Pipe.t(),
  optional(:stderr) => Wasmex.Pipe.t()
}) :: {:error, binary()} | {:ok, t()}