code: def test_marshal_with_envelope(self):
      model = OrderedDict([("foo", fields.Raw)])
      marshal_dict = OrderedDict([("foo", "bar"), ("bat", "baz")])
      output = marshal(marshal_dict, model, envelope="hey")
      assert output == {"hey": {"foo": "bar"}}
  
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 4 for calling the MarshallingTest obj's underlying member method code with example usage: obj.test_marshal_with_envelope() without return types