unpacked JaggedArray
  num_bins: 7
  num_elements: 23
  counts:  3 4 3 3 5 3 2
  values:  d h v i y q s
           f o b r q i i
           f r f v s a  
             i     g    
                   b    

packed JaggedArray
  num_bins: 7
  num_elements: 23
  offsets:  0 3 7 10 13 18 21
  values:   d f f h o r i v b f i r v y q s g b q i a s i

Batch test completed.