Mainflux.mainflux/vendor/github.com/plgd-dev/go-coap/v2/tcp/nocopy.go

package tcp

// Embed this type into a struct, which mustn't be copied,
// so `go vet` gives a warning if this struct is copied.
//
// See https://github.com/golang/go/issues/8005#issuecomment-190753527 for details.
// and also: https://stackoverflow.com/questions/52494458/nocopy-minimal-example

type noCopy struct{}

func (*noCopy) Lock()   {}
func (*noCopy) Unlock() {}