Specifies the type of function passed to glib.global.ioAddWatch or glib.global.ioAddWatchFull, which is called when the requested condition on a #GIOChannel is satisfied.
the function should return false if the event source should be removed
Specifies the type of function passed to glib.global.ioAddWatch or glib.global.ioAddWatchFull, which is called when the requested condition on a #GIOChannel is satisfied.