code: @DoesServiceRequest
      public CloudQueueMessage peekMessage(final QueueRequestOptions options, final OperationContext opContext)
              throws StorageException {
          return getFirstOrNull(this.peekMessages(1, null /* options */, null /* opContext */));
      }
docs: Peeks a message from the queue, using the specified request options and operation context. A peek request
  retrieves a message from the front of the queue without changing its visibility.
  
  @param options
  A {@link QueueRequestOptions} object that specifies any additional options for the request. Specifying
  <code>null</code> will use the default request options from the associated service client (
  {@link CloudQueueClient}).
  @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 An {@link CloudQueueMessage} object that represents the requested message from the queue.
  
  @throws StorageException
  If a storage service error occurred during the operation.