'Use this method to pin a message in a supergroup.
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 message_id: Int: Identifier of a message to pin
:param disable_notification: Bool: Pass True, if it is not necessary to send a notification
to all group members about the new pinned message
:return:'

def pin_chat_message(self, chat_id, message_id, disable_notification=False):

    return apihelper.pin_chat_message(self.token, chat_id, message_id, disable_notification)
