Jiaming Yuan f2b8cd2922
Add number of columns to native data iterator. (#5202)
* Change native data iter into an adapter.
2020-02-25 23:42:01 +08:00
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2020-02-23 06:27:03 +08:00
2020-02-25 08:32:46 +08:00
2020-02-18 16:49:17 +13:00
2020-02-23 06:27:03 +08:00