public boolean processMessageLine(Callback callback) {
    final String line = callback.getNextLine();
    if(line == null) {
      return false;
    }
    // common statistics messages (javac & jikes)
    for (ParserAction action : myParserActions) {
      if (action.execute(line, callback)) {
        return true;
      }
    }
    if (StringUtil.startsWithChar(line, '[') && StringUtil.endsWithChar(line, ']')) {
      // at this point any meaningful output surrounded with '[' and ']' characters is processed, so
      // suppress messages like "[total 4657ms]" or "[search path for source files: []]"
      return true;
    }
    return false;
  }
public boolean processMessageLine(Callback callback)