human
Solve the following python programming problem given the following code:
@ classmethod 
@ utils.positional (1) 
def method(cls, request_fields = None, response_fields = None, user_required = False, **kwargs) : 
    "Creates an API method decorator using provided metadata.

    Augments the endpoints.method decorator-producing function by allowing
    API methods to receive and return a class instance rather than having to
    worry with ProtoRPC messages (and message class definition). By specifying
    a list of ProtoRPC fields rather than defining the class, response and
    request classes can be defined on the fly.

    If there is any collision between request/response field lists and potential
    custom request/response message definitions that can be passed to the
    endpoints.method decorator, this call will fail.

    All other arguments will be passed directly to the endpoints.method
    decorator-producing function. If request/response field lists are used to
    define custom classes, the newly defined classes will also be passed to
    endpoints.method as the keyword arguments request_message/response_message.

    If a custom request message class is passed in, the resulting decorator will
    not attempt to convert the ProtoRPC message it receives into an
    EndpointsModel entity before passing it to the decorated method. Similarly,
    if a custom response message class is passed in, no attempt will be made to
    convert the object (returned by the decorated method) in the opposite
    direction.

    NOTE: Using utils.positional(1), we ensure the class instance will be the
    only positional argument hence won't have leaking/collision between the
    endpoints.method decorator function that we mean to pass metadata to.

    Args:
      request_fields: An (optional) list, tuple, dictionary or
          MessageFieldsSchema that defines a field ordering in a ProtoRPC
          message class. Defaults to None.
      response_fields: An (optional) list, tuple, dictionary or
          MessageFieldsSchema that defines a field ordering in a ProtoRPC
         ...

    
    

    Fix the buggy line: return proto_message
assistant
#Here is Python program to fix the buggy line: return proto_message
.

return def RequestToEntityDecorator(