public void addHelpSet(URL url, GHelpClassLoader classLoader) throws HelpSetException {
		HelpSet hs = createHelpSet(url, classLoader);
		if (hs == null) {
			return;
		}

		if (hasMergedHelpSets) {
			mainHS.add(hs);
		}
		else {
			helpSetsPendingMerge.add(hs);
		}
	}
Add the help set for the given URL.

@param url url for the HelpSet (.hs) file
@param classLoader the help classloader that knows how to find help modules in the classpath
@throws HelpSetException if the help set could not be created from the given URL.
Ghidra/Framework/Docking/src/main/java/docking/help/HelpManager.java