Traverser<Character> traverser = Traverser.forTree(CYCLIC_GRAPH_CONTAINING_TREE);

    assertEqualCharNodes(traverser.depthFirstPostOrder('a'), "cdba");
    assertEqualCharNodes(traverser.depthFirstPostOrder('b'), "cdb");
    assertEqualCharNodes(traverser.depthFirstPostOrder('d'), "d");
  }

  @Test
  public void forTree_depthFirstPostOrderIterable_cyclicGraphContainingTree() throws Exception {

				"application/vnd.avistar+xml",
				"application/vnd.blueice.multipass",
				"application/vnd.bluetooth.ep.oob",
				"application/vnd.bmi",
				"application/vnd.businessobjects",
				"application/vnd.cab-jscript",
				"application/vnd.canon-cpdl",
				"application/vnd.canon-lips",
				"application/vnd.cendio.thinlinc.clientconf",
				"application/vnd.chemdraw+xml",
				"application/vnd.chipnuts.karaoke-mmd",

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