Only generate toProtoSomeType function

[normalllll]

I need to implement a custom RPC service instead of the CRUD generated by entpb by default, so I only need to generate the proto file and ent.SomeType to protobuf struct,

How can we generate func toProtoSomeType(event.SomeTime) (*Some Type, error) without generating the default CRUD Service?

tried this

func (ModelMixin) Annotations() []schema.Annotation {
	return []schema.Annotation{
		entproto.Message(),
		entproto.Service(entproto.Methods(entproto.Method(1))),
	}
}

But entgo still generates an empty gRPC Service