Gets the listener for the specified callback.
\param signal The signal that contains the specified listener \param notify The listener that is the target of this search \return the list item that corresponds to the specified listener, or NULL if none was found
\memberof wl_signal
See Implementation
Gets the listener for the specified callback.
\param signal The signal that contains the specified listener \param notify The listener that is the target of this search \return the list item that corresponds to the specified listener, or NULL if none was found
\memberof wl_signal