'Use this method to change the description of a supergroup or a channel.
The bot must be an administrator in the chat for this to work and must have the appropriate admin rights.
Returns True on success.
:param chat_id: Int or Str: Unique identifier for the target chat or username of the target channel
(in the format @channelusername)
:param description: Str: New chat description, 0-255 characters
:return:'

def set_chat_description(self, chat_id, description):

    return apihelper.set_chat_description(self.token, chat_id, description)
