private void loadGHelpStyleSheet(HTMLDocument doc) {

		Reader reader = getGStyleSheetReader();
		if (reader == null) {
			return;
		}

		StyleSheet ss = doc.getStyleSheet();
		try {
			ss.loadRules(reader, null);
		}
		catch (IOException e) {
			// shouldn't happen
			Msg.debug(this, "Unable to load help style sheet");
		}
	}
Generates a new event with a URL based upon Ghidra's resources if needed.
Ghidra/Framework/Help/src/main/java/help/GHelpHTMLEditorKit.java