generate()
  Error: --client-operations['/paths/~1pets/post'].body_field_names: body_field_names need body_arguments 'both' for the operation; --client-operations['/paths/~1pets~1{petId}~1photo/put'].body_field_names['json']['']: A body field name needs a media type, a wire property, and an identifier; --client-operations['/paths/~1pets~1{petId}~1photo/put'].body_field_names['Application/JSON']['tag']: The Application/JSON body field 'tag' is named twice
