$ref not found and Yaml Extension

[avelinob]

I get this error:

Traceback` (most recent call last):
  File "swagger_to_uml.py", line 380, in <module>
    sw = Swagger.from_file(input_file_name)
  File "swagger_to_uml.py", line 367, in from_file
    return Swagger.from_dict(loader(fd))
  File "swagger_to_uml.py", line 357, in from_dict
    definitions = [Definition.from_dict(name, definition) for name, definition in d.get('definitions',{}).items()]
  File "swagger_to_uml.py", line 357, in <listcomp>
    definitions = [Definition.from_dict(name, definition) for name, definition in d.get('definitions',{}).items()]
  File "swagger_to_uml.py", line 197, in from_dict
    required=property_name in d.get('required', [])
  File "swagger_to_uml.py", line 103, in from_dict
    items = resolve_ref(type_dict['items']['$ref'])
KeyError: '$ref'

Fixed:

c103
<                 items = resolve_ref(type_dict['items']['$ref']) if '$ref' in type_dict['items'] else None
c364
<         if filename.endswith('.yml') or filename.endswith('.yaml'):

Sorry cant do pull req due to ... policy