private void notifyScrollListenerDataChanged(BigInteger start, BigInteger end) {
		for (IndexScrollListener listener : listeners) {
			listener.indexModelDataChanged(start, end);
		}
	}
Returns the offset of the cursor from the top of the screen

@return the offset of the cursor from the top of the screen
Ghidra/Framework/Docking/src/main/java/docking/widgets/fieldpanel/FieldPanel.java