api/proto/build_api.proto

// Custom option defs must be proto2 syntax.
syntax = "proto2";
import "google/protobuf/descriptor.proto";

// Build API custom Service and Method options.

// Custom Service options.
message BuildApiServiceOptions {
  // The name of the module implementing the service.
  required string module = 1;
}

// Custom Method options.
message BuildApiMethodOptions {
  // The name of the function implementing the method if different than the
  // method name defined in the .proto.
  optional string implementation_name = 1;
}

extend google.protobuf.ServiceOptions {
  optional BuildApiServiceOptions service_options = 55000;
}

extend google.protobuf.MethodOptions {
  optional BuildApiMethodOptions method_options = 55000;
}