const net.defaultTCPKeepAliveIdle

3 uses

	net (current package)
		dial.go#L19: 	defaultTCPKeepAliveIdle = 15 * time.Second
		file_unix.go#L77: 		return newTCPConn(fd, defaultTCPKeepAliveIdle, KeepAliveConfig{}, testPreHookSetKeepAlive, testHookSetKeepAlive), nil
		tcpsockopt_unix.go#L17: 		d = defaultTCPKeepAliveIdle