Protected Readonly emitterReadonly onFired when any of the available tree decorators has changes.
Counterpart of the deflateDecorators method. Restores the argument into a Map
of tree node IDs and the corresponding decorations data array (decoration data).
the deserialized `decoration data
The default tree decorator service. Does nothing at all. One has to rebind to a concrete implementation if decorators have to be supported in the tree widget.