code: @Override
      public RetryPolicy createInstance(final OperationContext opContext) {
          return new RetryExponentialRetry(this.resolvedMinBackoff, this.deltaBackoffIntervalInMs,
                  this.resolvedMaxBackoff, this.maximumAttempts);
      }
docs: Generates a new retry policy for the current request attempt.
  
  @param opContext
  An {@link OperationContext} object that represents the context for the current operation. This object
  is used to track requests to the storage service, and to provide additional runtime information about
  the operation.
  
  @return A {@link RetryPolicy} object that represents the retry policy for the current request attempt.