cl = ExecutionContext.getCustomClassLoader( classPathKey, null );
cl = ExecutionContext.getCustomClassLoader( classPathKey, (Map)null );
	private static Class getClassUsingCustomClassPath( String className,			String classPathKey, ExecutionContext context )	{		ClassLoader cl = null;		// If we have a context instance, we can use it to (enables caching of		// the class loaders)		if ( context != null )			cl = context.getCustomClassLoader( classPathKey );		//No context available, use the static method (no caching used)		else			cl = ExecutionContext.getCustomClassLoader( classPathKey, null );		if ( cl == null )			return null;		try		{			return cl.loadClass( className );			// Note: If the class can			// not even be loadded by this			// loader either, null will be returned		} catch ( ClassNotFoundException e )		{			// Ignore		}		return null;	}