unpacked JaggedArray
  num_bins: 7
  num_elements: 24
  counts:  5 1 5 3 2 3 5
  values:  u f j w g k s
           h   l g w b l
           m   w r   s l
           w   m       u
           b   r       p

packed JaggedArray
  num_bins: 7
  num_elements: 24
  offsets:  0 5 6 11 14 16 19
  values:   u h m w b f j l w m r w g r g w k b s s l l u p

Batch test completed.