@Override
		public void waitForNextUpdate() throws Exception {
			// note: this is bad design to have a method on the interface that is not 
			//       supported by all implementations.  But, it was easy, so this will alert
			//       test writers to incorrect usage of this class.
			throw new UnsupportedOperationException();
		}
A policy that will initially load half of its data, waiting for the signal to finish
loading the second half.
Ghidra/Framework/Docking/src/test.slow/java/docking/widgets/table/threaded/IncrementalThreadedTableTest.java