the priority of the idle source; typically this will be in the range between GLib.PRIORITY_DEFAULT_IDLE and GLib.PRIORITY_HIGH_IDLE
function to call
Optionalnotify: DestroyNotifyfunction to call when the idle is removed
the ID (greater than 0) of the event source
Adds a function to be called whenever there are no higher priority events pending.
If the function returns GLib.SOURCE_REMOVE it is automatically removed from the list of event sources and will not be called again.
See main loop memory management for details on how to handle the return value and memory management of
data.This internally creates a main loop source using GLib.idle_source_new and attaches it to the global GLib.MainContext using GLib.Source.attach, so the callback will be invoked in whichever thread is running that main context. You can do these steps manually if you need greater control or to use a custom main context.