@Override
  public void println(int logLevel, String tag, String msg) {
    String flattenedLog = flattener.flatten(logLevel, tag, msg).toString();
    System.out.println(flattenedLog);
  }
Constructor.

@param flattener the log flattener when print a log
xlog/src/main/java/com/elvishew/xlog/printer/ConsolePrinter.java