// Collect the ymethods in a map for quick lookup.
			ymap := make(map[string]*Func, len(ymethods))
			for _, ym := range ymethods {
				ymap[ym.Id()] = ym
			}
			// All xmethods must exist in ymethods and corresponding signatures must unify.
			for _, xm := range xmethods {
				if ym := ymap[xm.Id()]; ym == nil || !u.nify(xm.typ, ym.typ, exact, p) {
					return false
				}
			}
			return true
		}

			// Collect the ymethods in a map for quick lookup.
			ymap := make(map[string]*Func, len(ymethods))
			for _, ym := range ymethods {
				ymap[ym.Id()] = ym
			}
			// All xmethods must exist in ymethods and corresponding signatures must unify.
			for _, xm := range xmethods {
				if ym := ymap[xm.Id()]; ym == nil || !u.nify(xm.typ, ym.typ, exact, p) {
					return false
				}
			}
			return true
		}

	for i, item := range os {
		if i != 0 {
			if _, err := b.WriteString("\n\n"); err != nil {
				return "", err
			}
		}
		ym, err := item.YAML()
		if err != nil {
			return "", fmt.Errorf("error building yaml: %v", err)
		}
		if _, err := b.Write(ym); err != nil {
			return "", err
		}
		if _, err := b.WriteString(YAMLSeparator); err != nil {
			return "", err
		}

	}

	// compare mantissas
	i := len(x.mant)
	j := len(y.mant)
	for i > 0 || j > 0 {
		var xm, ym Word
		if i > 0 {
			i--
			xm = x.mant[i]
		}
		if j > 0 {
			j--
			ym = y.mant[j]
		}
		switch {
		case xm < ym:
			return -1
		case xm > ym:
			return +1
		}
	}

	return 0
}

00000110  f1 e3 47 89 a6 1d 80 26  cb 23 6e f3 83 1c e4 85  |..G....&.#n.....|
00000120  7b 1a 4d 12 c8 bf ff 07  39 a9 4e 4e d7 45 35 23  |{.M.....9.NN.E5#|
00000130  9b f9 59 6d a5 b0 49 1b  5f e7 42 62 17 00 1e 57  |..Ym..I._.Bb...W|
00000140  53 c5 22 fb 05 89 fd fe  5d de 71 e8 26 fd 6d e3  |S.".....].q.&.m.|
00000150  fc b9 cb 1f d5 d4 84 d1  67 fe 8a a0 74 ff ad ff  |........g...t...|

>>> Flow 3 (client to server)
00000000  14 03 03 00 01 01 17 03  03 02 11 9e 9e cf 44 84  |..............D.|
00000010  df e7 23 47 2d 4e 85 fa  f2 02 2a 79 4d 3a 3d df  |..#G-N....*yM:=.|
00000020  48 95 2e d7 0d 3c d0 05  fc bf bb 23 0a 25 59 76  |H....<.....#.%Yv|
00000030  fd 04 f8 f0 81 88 85 9f  99 f0 55 91 9a 79 8a 39  |..........U..y.9|

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