def METHOD_NAME(self, cls_name, none_if_missing=False):
    """
    Get Soot class object.
    :param str cls_name: Name of the class.
    :return:             The class object.
    :rtype:              pysoot.soot.SootClass
    """
    try:
        return self._classes[cls_name]
    except KeyError:
        if none_if_missing:
            return None
        else:
            raise CLEError('Class "%s" does not exist.' % cls_name)