inferTypesForCmp(&a, &b)

		if a.Equals(b) {
			return true
		}

		// If elements, compare each.
		aA, aOK := a.ToArray()
		bA, bOK := b.ToArray()
		if aOK && bOK {
			if len(aA) != len(bA) {
				return false
			}
			for i := range aA {
				if !cmp(aA[i], bA[i]) {
					return false
				}
			}
			return true
		}
		// Try as numbers
		aF, aOK := a.ToFloat()
		bF, bOK := b.ToFloat()

		if okBi && okAf {
			a.setFloat(fA)
			b.setInt(iB)
			return nil
		}

		// Not numeric types at this point.

		// Check for bool inference
		bA, okAb := a.bytesToBool()
		bB, okBb := b.bytesToBool()
		if okAb && okBb {
			a.setBool(bA)
			b.setBool(bB)
			return nil
		}

		// Fallback to string
		sA := a.bytesToString()
		sB := b.bytesToString()
		a.setString(sA)
		b.setString(sB)

    Iterable<Character> result = Traverser.forGraph(TWO_TREES).depthFirstPostOrder('a');

    assertEqualCharNodes(result, "ba");
  }

  @Test
  public void forGraph_depthFirstPostOrderIterable_twoTrees() {
    assertEqualCharNodes(
        Traverser.forGraph(TWO_TREES).depthFirstPostOrder(charactersOf("a")), "ba");
    assertEqualCharNodes(
        Traverser.forGraph(TWO_TREES).depthFirstPostOrder(charactersOf("ac")), "badc");
  }

        map.put("デュ", new String[] { "dyu" });
        map.put("トゥ", new String[] { "tu", "twu" });
        map.put("ドゥ", new String[] { "du", "dwu" });

        map.put("バ", new String[] { "ba" });
        map.put("ビ", new String[] { "bi" });
        map.put("ブ", new String[] { "bu" });
        map.put("ベ", new String[] { "be" });
        map.put("ボ", new String[] { "bo" });