private void init() {

		// swap in Ghidra's editor kit, which is an overridden version of Java's
		String type = "text/html";
		String editorKit = GHelpHTMLEditorKit.class.getName();
		ClassLoader classLoader = getClass().getClassLoader();
		setKeyData(kitTypeRegistry, type, editorKit);
		setKeyData(kitLoaderRegistry, type, classLoader);

		initializeCombinedMapWrapper();
	}
<b>static</b> map that contains all known help sets in the system.
Ghidra/Framework/Help/src/main/java/help/GHelpSet.java