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Have you seen Contracts? https://go.googlesource.com/proposal/+/master/design/go2draft-contracts.md https://go.googlesource.com/proposal/+/master/design/go2dra

Have you seen Contracts? https://go.googlesource.com/proposal/+/master/design/go2draft-contracts.md https://go.googlesource.com/proposal/+/master/design/go2draf...