Called by the Router when an outlet disposes of a component's contents.
This method in turn is responsible for calling the routerOnDeactivate hook of its child.
Source
Future<dynamic> deactivate(ComponentInstruction nextInstruction) {
var next = _resolveToTrue;
if (_componentRef != null) {
next = this._componentRef.then((ComponentRef ref) =>
hasLifecycleHook(hook_mod.routerOnDeactivate, ref.instance)
? ((ref.instance as OnDeactivate))
.routerOnDeactivate(nextInstruction, this._currentInstruction)
: true);
}
return next.then((_) {
if (_componentRef != null) {
var onDispose =
this._componentRef.then((ComponentRef ref) => ref.destroy());
this._componentRef = null;
return onDispose;
}
});
}