@classmethod<EOL><INDENT>def __get_arg(cls, kwds, kwd):<DEDENT>
alt_kwd = '<STR_LIT:_>' + kwd<EOL>if alt_kwd in kwds:<EOL><INDENT>return kwds.pop(alt_kwd)<EOL><DEDENT>if kwd in kwds:<EOL><INDENT>obj = getattr(cls, kwd, None)<EOL>if not isinstance(obj, Property) or isinstance(obj, ModelKey):<EOL><INDENT>return kwds.pop(kwd)<EOL><DEDENT><DEDENT>return None<EOL>
Internal helper method to parse keywords that may be property names.