code: async def pin(self):
          
  
          await self._state.http.pin_message(self.channel.id, self.id)
          self.pinned = True
docs: |coro|
  
          Pins the message.
  
          You must have the :attr:`~Permissions.manage_messages` permission to do
          this in a non-private channel context.
  
          Raises
          -------
          Forbidden
              You do not have permissions to pin the message.
          NotFound
              The message or channel was not found or deleted.
          HTTPException
              Pinning the message failed, probably due to the channel
              having more than 50 pinned messages.