func golang.org/x/xerrors.Is

3 uses

	golang.org/x/xerrors (current package)
		wrap.go#L50: func Is(err, target error) bool {

	github.com/google/go-cmp/cmp/cmpopts
		equate.go#L155: 	return xerrors.Is(xe, ye) || xerrors.Is(ye, xe)

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