@Override
		public void importTokensFromTokensFile() {
			// don't try to import tokens files; must give me both grammars if split
		}
Interpret a lexer/parser, optionally printing tree string and dumping profile info

 $ java org.antlr.v4.gui.Interpreter [X.g4|XParser.g4 XLexer.g4] startRuleName inputFileName
       [-tree]
       [-gui]
       [-trace]
       [-encoding encoding]
       [-tokens]
       [-profile filename.csv]
tool/src/org/antlr/v4/gui/Interpreter.java