000000e0  37 ef 0d 19 51 88 35 75  71 b5 e5 54 5b 12 2e 8f  |7...Q.5uq..T[...|
000000f0  09 67 fd a7 24 20 3e b2  56 1c ce 97 28 5e f8 2b  |.g..$ >.V...(^.+|
00000100  2d 4f 9e f1 07 9f 6c 4b  5b 83 56 e2 32 42 e9 58  |-O....lK[.V.2B.X|
00000110  b6 d7 49 a6 b5 68 1a 41  03 56 6b dc 5a 89        |..I..h.A.Vk.Z.|
>>> Flow 2 (server to client)
00000000  16 03 03 00 9b 02 00 00  97 03 03 1c 1a ee 30 2f  |..............0/|

	SO_TIMESTAMPING                  = 0x23
	SO_TIMESTAMPING_NEW              = 0x43
	SO_TIMESTAMPING_OLD              = 0x23
	SO_TIMESTAMPNS                   = 0x21
	SO_TIMESTAMPNS_NEW               = 0x42
	SO_TIMESTAMPNS_OLD               = 0x21
	SO_TIMESTAMP_NEW                 = 0x46
	SO_TXREHASH                      = 0x53
	SO_TXTIME                        = 0x3f
	SO_TYPE                          = 0x1008

	SO_RCVBUFFORCE                   = 0x21
	SO_RCVLOWAT                      = 0x10
	SO_RCVMARK                       = 0x4b
	SO_RCVTIMEO                      = 0x12
	SO_RCVTIMEO_NEW                  = 0x42
	SO_RCVTIMEO_OLD                  = 0x12
	SO_RESERVE_MEM                   = 0x49
	SO_REUSEADDR                     = 0x2
	SO_REUSEPORT                     = 0xf
	SO_RXQ_OVFL                      = 0x28

	"\x08\x88\x48\xc8\x28\xa8\x68\xe8\x18\x98\x58\xd8\x38\xb8\x78\xf8" +
	"\x04\x84\x44\xc4\x24\xa4\x64\xe4\x14\x94\x54\xd4\x34\xb4\x74\xf4" +
	"\x0c\x8c\x4c\xcc\x2c\xac\x6c\xec\x1c\x9c\x5c\xdc\x3c\xbc\x7c\xfc" +
	"\x02\x82\x42\xc2\x22\xa2\x62\xe2\x12\x92\x52\xd2\x32\xb2\x72\xf2" +
	"\x0a\x8a\x4a\xca\x2a\xaa\x6a\xea\x1a\x9a\x5a\xda\x3a\xba\x7a\xfa" +
	"\x06\x86\x46\xc6\x26\xa6\x66\xe6\x16\x96\x56\xd6\x36\xb6\x76\xf6" +

	}
	// variable map header, size zb0001Len
	err = en.Append(0x80 | uint8(zb0001Len))
	if err != nil {
		return
	}
	if zb0001Len == 0 {
		return
	}
	// write "BaseOptions"
	err = en.Append(0xab, 0x42, 0x61, 0x73, 0x65, 0x4f, 0x70, 0x74, 0x69, 0x6f, 0x6e, 0x73)
	if err != nil {
		return
	}
	// map header, size 0
	_ = z.BaseOptions
	err = en.Append(0x80)
	if err != nil {
		return
	}

	IPV6_RECVHOPLIMIT                = 0x33
	IPV6_RECVHOPOPTS                 = 0x35
	IPV6_RECVPKTINFO                 = 0x31
	IPV6_RECVRTHDR                   = 0x38
	IPV6_RECVTCLASS                  = 0x42
	IPV6_ROUTER_ALERT                = 0x16
	IPV6_RTHDR                       = 0x39
	IPV6_RTHDRDSTOPTS                = 0x37
	IPV6_RTHDR_LOOSE                 = 0x0
	IPV6_RTHDR_STRICT                = 0x1

	0xac, 0x4c, 0x8c, 0x83, 0x3d, 0x77, 0x85, 0xb3, 0x6e, 0x93, 0xe3, 0x8b, 0x56, 0xe2, 0xe1, 0xeb,
	0xc2, 0x1e, 0x94, 0x85, 0x8d, 0x3a, 0x8c, 0xf4, 0x42, 0xe2, 0x09, 0xd2, 0x66, 0x94, 0xf1, 0xd4,
	0x4f, 0xc0, 0x1c, 0x8e, 0x95, 0x89, 0xee, 0x6d, 0x97, 0x85, 0xad, 0x3d, 0xa9, 0x31, 0xd2, 0xee,
	0xe2, 0x13, 0xa4, 0x73, 0x3f, 0x8f, 0x80, 0x13, 0x38, 0x37, 0x37, 0x65, 0x25, 0xef, 0xf5, 0x2b,

	SO_RCVBUFFORCE                   = 0x21
	SO_RCVLOWAT                      = 0x10
	SO_RCVMARK                       = 0x4b
	SO_RCVTIMEO                      = 0x12
	SO_RCVTIMEO_NEW                  = 0x42
	SO_RCVTIMEO_OLD                  = 0x12
	SO_RESERVE_MEM                   = 0x49
	SO_REUSEADDR                     = 0x2
	SO_REUSEPORT                     = 0xf
	SO_RXQ_OVFL                      = 0x28

	SO_RCVBUFFORCE                   = 0x21
	SO_RCVLOWAT                      = 0x12
	SO_RCVMARK                       = 0x4b
	SO_RCVTIMEO                      = 0x14
	SO_RCVTIMEO_NEW                  = 0x42
	SO_RCVTIMEO_OLD                  = 0x14
	SO_RESERVE_MEM                   = 0x49
	SO_REUSEADDR                     = 0x2
	SO_REUSEPORT                     = 0xf
	SO_RXQ_OVFL                      = 0x28

        // https://plugins.gradle.org/plugin/com.diffplug.spotless
        static spotless = Versions.of("6.25.0")

        // https://plugins.gradle.org/plugin/com.google.cloud.tools.jib
        static jib = Versions.of("3.4.2")

        // https://plugins.gradle.org/plugin/io.freefair.lombok
        static lombok = Versions.of("8.6")

        // https://plugins.gradle.org/plugin/com.moowork.node
        static node = Versions.of("1.3.1")