code: def get_option_names(self):
          
          return [x for x in self.option_definitions.keys_breadth_first()
                  if isinstance(self.option_definitions[x], Option)]
docs: returns a list of fully qualified option names.
  
          returns:
              a list of strings representing the Options in the source Namespace
              list.  Each item will be fully qualified with dot delimited
              Namespace names.