const golang.org/x/sys/unix.NS_GET_TGID_IN_PIDNS

one use

	golang.org/x/sys/unix (current package)
		zerrors_linux_amd64.go#L167: 	NS_GET_TGID_IN_PIDNS             = 0x8004b709

The pages are generated with Golds v0.7.6. (GOOS=linux GOARCH=amd64)