original_docstring: 
          Provider-specific code for fetching, must be implemented in a
          sub-class.
          
docstring: Provider-specific code for fetching, must be implemented in a
  sub-class.
docstring_tokens: Provider - specific code for fetching must be implemented in a sub - class .
code: def _fetch(self):
          '''
          Provider-specific code for fetching, must be implemented in a
          sub-class.
          '''
          raise NotImplementedError()
code_tokens: def _fetch ( self ) : raise NotImplementedError ( )
short_docstring: Provider-specific code for fetching, must be implemented in a
  sub-class.
short_docstring_tokens: Provider - specific code for fetching must be implemented in a sub - class .
comment: '''
          Provider-specific code for fetching, must be implemented in a
          sub-class.
          '''