Yujun Zhang 53fc5657d1 cardinality_for should be be chosen from source/target ... It is easier to implement and understand to use key instead of value Change-Id: If33f5c316393c48a0555a0fd1c92bd0ccf13f7a2		2017-10-17 10:50:09 +08:00
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source	cardinality_for should be be chosen from source/target	2017-10-17 10:50:09 +08:00