Draggable: In need of a "all-done" event

Draggable: In need of a "all-done" event


When dropping an element somewhere in "the dropzone" where it should
connect to a sortable element, then the element animates it's way to
somewhere in the sortable element.
The event "stop" is triggered when you release the mouse button, but I
need an event that triggers when the element has attached itself to
it's spot in the sortable element.
Is there already some way I can catch that event or?
Thanks in advance...