private void calloutReference(final URL url) {
		String ref = url.getRef();
		if (ref == null) {
			return;
		}

		final Rectangle area = getReferenceArea(ref);
		if (area == null) {
			return;
		}

		doCalloutReference(area, 0);
	}
An extension of the {@link GHelpBroker} that allows {@code Docking} classes to be installed.
<p>
Additions include a search feature a navigation aid.
Ghidra/Framework/Docking/src/main/java/docking/help/DockingHelpBroker.java