private void doAddHelpSet(HelpModuleLocation location) {
		if (location.isHelpInputSource()) {
			return; // help sets only exist in pre-built help 
		}

		HelpSet helpSet = location.getHelpSet();
		externalHelpSets.add(helpSet);
	}
Creates a help module collection that assumes zero or more pre-built help jar files and
one help directory that is an input into the help building process.
@param locations the locations from which to get help
@return the help collection
Ghidra/Framework/Help/src/main/java/help/validator/location/HelpModuleCollection.java