private boolean isWorkerBusy() {
		return worker != null && worker.isBusy();
	}
Returns whether this table is loading, which is somewhat misleading.
<p>
If this table model is an incrementally loading table model, then this method returns true
only when an incremental load is taking place.  Otherwise, this method returns true
whenever the update manager is busy, which may be a load operation, or just a sort
operation.  At issue is the fact that unless we are an incrementally loading model, we
cannot tell if we are actually loading, or just busy otherwise manipulating out data.

@return whether this table is loading, which is somewhat misleading.
Ghidra/Framework/Docking/src/main/java/docking/widgets/table/threaded/ThreadedTableModel.java