gio:application-bind-busy-property (application object property)

application -- a g:application instance
object -- a g:object instance
property -- a string for the name of a boolean property of object

Marks the application as busy while the property on the object is true. See the g:application-mark-busy function. The binding holds a reference to the application while it is active, but not to the object. Instead, the binding is destroyed when the object is finalized.