parameters: (self, key)
docstring: Remove the keyed message; raise KeyError if it doesn't exist.
docstring_summary: Remove the keyed message; raise KeyError if it doesn't exist.
docstring_tokens: Remove the keyed message ; raise KeyError if it doesn t exist .
function: def remove(self, key):
          """Remove the keyed message; raise KeyError if it doesn't exist."""
          raise NotImplementedError('Method must be implemented by subclass')
function_tokens: def remove ( self , key ) : raise NotImplementedError ( 'Method must be implemented by subclass' )