code: def test_marshal_field_decorator_tuple(self):
      model = fields.Raw
  
      @marshal_with_field(model)
      def try_me():
          return "foo", 200, {"X-test": 123}
  
      assert try_me() == ("foo", 200, {"X-test": 123})
  
imports: from __future__ import unicode_literals
  import pytest
  from flask_restplus import marshal, marshal_with, marshal_with_field, fields, Api, Resource
label_desc: Use image node_id 15 for calling the MarshallingTest obj's underlying member method code with example usage: obj.test_marshal_field_decorator_tuple() and returns: str,  int,  dict