code: public String getComputeNodeRemoteDesktop(String poolId, String nodeId) throws BatchErrorException, IOException {
          return getComputeNodeRemoteDesktop(poolId, nodeId, null);
      }
docs: Gets a Remote Desktop Protocol (RDP) file for the specified node.
  
  @param poolId The ID of the pool that contains the compute node.
  @param nodeId The ID of the compute node for which to get a Remote Desktop file.
  @return The RDP file contents.
  @throws BatchErrorException Exception thrown when an error response is received from the Batch service.
  @throws IOException Exception thrown when there is an error in serialization/deserialization of data sent to/received from the Batch service.