original_docstring: 
          This function must be overridden in a sub-class
          
docstring: This function must be overridden in a sub-class
docstring_tokens: This function must be overridden in a sub - class
code: def envs(self):
          '''
          This function must be overridden in a sub-class
          '''
          raise NotImplementedError()
code_tokens: def envs ( self ) : raise NotImplementedError ( )
short_docstring: This function must be overridden in a sub-class
short_docstring_tokens: This function must be overridden in a sub - class
comment: '''
          This function must be overridden in a sub-class
          '''