private void clearHighlights() {
		TextHelpModel helpModel = (TextHelpModel) getCustomHelpModel();
		if (helpModel != null) {
			helpModel.removeAllHighlights();
		}
	}
Construct a new GhidraHelpBroker.
@param hs java help set associated with this help broker
Ghidra/Framework/Help/src/main/java/help/GHelpBroker.java