code: @Override
      public void retry(VolleyError error) throws VolleyError {
          mCurrentRetryCount++;
          mCurrentTimeoutMs += (mCurrentTimeoutMs * mBackoffMultiplier);
          if (!hasAttemptRemaining()) {
              throw error;
          }
      }
docs: Prepares for the next retry by applying a backoff to the timeout.
  @param error The error code of the last attempt.