code: function (className, msg, msgArgs, o) {
              this.log(className, this.LEVEL_DEBUG, msgArgs, msg, o);
          }
docs: Log a debug message.
  @param {String} className The classname for which the log is to be done
  @param {String} msg the message text
  @param {Array} msgArgs An array of arguments to be used for string replacement in the message text
  @param {Object} o An optional object to inspect