Summary: this is useful to test rnn cells
Reviewed By: dzhulgakov
Differential Revision: D4720641
fbshipit-source-id: baa7df43357ed8af72ede64be3e0a642a40472df
Summary:
If we go to prod some of the sparse features might be empty or for some reason
batch might be empty. It's a good idea to be sure that we can run empty
batches.
Reviewed By: dzhulgakov
Differential Revision: D4197297
fbshipit-source-id: 1a154ebf625d1a39fd15354a154cf100f525ae9a