parameters: (self, message)
docstring: Add message and return assigned key.
docstring_summary: Add message and return assigned key.
docstring_tokens: Add message and return assigned key .
function: def add(self, message):
          """Add message and return assigned key."""
          raise NotImplementedError('Method must be implemented by subclass')
function_tokens: def add ( self , message ) : raise NotImplementedError ( 'Method must be implemented by subclass' )