code: @DoesServiceRequest
      public final int downloadToByteArray(final byte[] buffer, final int bufferOffset) throws StorageException {
          return this
                  .downloadToByteArray(buffer, bufferOffset, null /* accessCondition */, null /* options */, null /* opContext */);
      }
docs: Downloads a range of bytes from the file to the given byte buffer.
  
  @param buffer
  A <code>byte</code> array which represents the buffer to which the file bytes are downloaded.
  @param bufferOffset
  An <code>int</code> which represents the byte offset to use as the starting point for the target.
  
  @throws StorageException
  If a storage service error occurred.