public boolean isHint() {
	    int nextChar = _input.LA(1);
	    if (nextChar == '+') {
	      return true;
	    } else {
	      return false;
	    }
	  }
This method will be called when we see '/*' and try to match it as a bracketed comment.
If the next character is '+', it should be parsed as hint later, and we cannot match
it as a bracketed comment.

Returns true if the next character is '+'.
amoro-format-mixed/amoro-mixed-spark/v3.2/amoro-mixed-spark-3.2/src/main/gen-antlr/org/apache/amoro/spark/sql/parser/MixedFormatSqlExtendLexer.java