private void showHelpLocation(HelpLocation loc, Window window) {
		if (loc == null) {
			showDefaultHelpPage(window);
			return;
		}

		URL url = loc.getHelpURL();
		if (url != null) {
			displayHelp(url, window);
			return;
		}

		String helpId = loc.getHelpId();
		if (helpId == null) {
			showDefaultHelpPage(window);
			return;
		}

		try {
			displayHelp(createHelpID(helpId), window);
		}
		catch (BadIDException e) {
			Msg.info(this,
				"Could not find help for ID: \"" + helpId + "\" from HelpLocation: " + loc);
			displayHelp(HELP_NOT_FOUND_PAGE_URL, window);
		}
	}
Returns the master help set (the one into which all other help sets are merged).
@return the help set
Ghidra/Framework/Docking/src/main/java/docking/help/HelpManager.java