private void grabSearchEngine() {
		Enumeration<?> navigators = jHelp.getHelpNavigators();
		while (navigators.hasMoreElements()) {
			Object element = navigators.nextElement();
			if (element instanceof JHelpSearchNavigator) {
				searchEngine = ((JHelpSearchNavigator) element).getSearchEngine();
			}
		}

		if (searchEngine == null) {
			throw new AssertException("Unable to locate help search engine");
		}
	}
Enables the Find Dialog for searching through the current page of a help document.
Ghidra/Framework/Docking/src/main/java/docking/help/HelpViewSearcher.java