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

one use

	golang.org/x/sys/unix (current package)
		zerrors_darwin_arm64.go#L1368: 	TCP_NOTSENT_LOWAT                 = 0x201

The pages are generated with Golds v0.2.8-preview. (GOOS=darwin GOARCH=arm64)