k DataLoad}, {@link ImageLoad}, {@link SwfLoad} or {@link VideoLoad}) based on the provided file's extension.
            
            @param request: A <code>String</code> or an <code>URLRequest</code> reference to the file you wish to load.
            @return The base <code>LoadItem</code> class being used to load the requested file. Can be cast as a specific load class.
            @throws ArguementTypeError if you pass a type other than a <code>String</code> or an <code>URLRequest</code> to parameter <