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

one use

	golang.org/x/sys/unix (current package)
		zerrors_darwin_arm64.go#L1555: 	ENOTCONN        = syscall.Errno(0x39)

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