if ( modeName==null ) modeName = "DEFAULT_MODE";
if ( g.modes.get(modeName)==null ) {
System.err.println("no such mode "+modeName);
return;
}
ParserATNFactory f = new LexerATNFactory(g);
ATN nfa = f.createATN();
ATNState startState = nfa.modeNameToStartState.get(modeName);
ATNPrinter serializer = new ATNPrinter(g, startState);
String result = serializer.asString();
//System.out.print(result);
assertEquals(expecting, result);