code: @DoesServiceRequest
      public final String startCopy(final CloudBlob sourceBlob) throws StorageException, URISyntaxException {
          return this.startCopy(sourceBlob, null /* sourceAccessCondition */,
                  null /* destinationAccessCondition */, null /* options */, null /* opContext */);
      }
docs: Requests the service to start copying a blob's contents, properties, and metadata to a new file.
  
  @param sourceBlob
  A <code>CloudBlob</code> object that represents the source blob to copy.
  
  @return A <code>String</code> which represents the copy ID associated with the copy operation.
  
  @throws StorageException
  If a storage service error occurred.
  @throws URISyntaxException