code: def connect(self, receiver, signal, function, description, sender=None):
          
          return self.__app.signals.connect(receiver, signal, function, self._plugin, description, sender)
docs: Connect a receiver to a signal
  
          :param receiver: Name of the receiver
          :type receiver: str
          :param signal: Name of the signal. Must already be registered!
          :type signal: str
          :param function: Callable functions, which shall be executed, of signal is send.
          :param description: Description of the reason or use case, why this connection is needed.
                              Used for documentation.