@Override
	public ATN getATN() { return _ATN; }
This method will be called when the character stream ends and try to find out the
unclosed bracketed comment.
If the method be called, it means the end of the entire character stream match,
and we set the flag and fail later.
amoro-format-mixed/amoro-mixed-spark/v3.5/amoro-mixed-spark-3.5/src/main/gen-antlr/org/apache/amoro/spark/sql/parser/MixedFormatSqlExtendLexer.java