Kevin Wan c566b5ff82 fix golint issues in core/stores (#527) %!s(int64=4) %!d(string=hai) anos
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collection.go c566b5ff82 fix golint issues in core/stores (#527) %!s(int64=4) %!d(string=hai) anos
collection_mock.go 14dee114dd add more tests %!s(int64=5) %!d(string=hai) anos