code: public void log(Throwable error, Map<String, Object> custom, String description, Level level,
        boolean isUncaught) {
      this.rollbar.log(error, custom, description, level, isUncaught);
    }
docs: Record an error or message with extra data at the level specified.
  At least ene of `error` or `description` must
  be non-null. If error is null, `description` will be sent as a message.
  If error is non-null, description will be
  sent as the description of the error.
  Custom data will be attached to message if the error is null.
  @param error the error (if any)
  @param custom the custom data (if any)
  @param description the description of the error, or the message to send
  @param level the level to send it at
  @param isUncaught whether or not this set of data originates from an uncaught exception.