public int getMaxCharValue() {
		return org.antlr.v4.runtime.Lexer.MAX_CHAR_VALUE;
//		if ( generator!=null ) {
//			return generator.getTarget().getMaxCharValue(generator);
//		}
//		else {
//			return Label.MAX_CHAR_VALUE;
//		}
	}
What is the max char value possible for this grammar's target?  Use
 unicode max if no target defined.
tool/src/org/antlr/v4/tool/Grammar.java