docs: def has_option(self, option_name=None):
  		""" Check whether configuration selection has the specified option.
  
  		:param option_name: option name to check. If no option is specified, then check is made for this option
  
  		:return: bool
  		"""
  		if option_name is None:
  			option_name = ''
  		return self.config().has_option(self.section(), self.option_prefix() + option_name)