public void markUnclosedComment() {
	    has_unclosed_bracketed_comment = true;
	  }
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