'Get a list of file type classes from the Mutagen module.'

@staticmethod
def _mutagen_classes():

    classes = []
    for (modname, clsname) in _MUTAGEN_FORMATS.items():
        mod = __import__('mutagen.{0}'.format(modname), fromlist=[clsname])
        classes.append(getattr(mod, clsname))
    return classes
