Lay out each child according to the sort order given by TreeVertex.comparer.
Lay out each child in reverse sort order given by TreeVertex.comparer.
Lay out each child in the order in which they were found.
Lay out each child in reverse order from which they were found.
This enumeration specifies whether to sort the children of a node, and in what order to position them. Used for TreeLayout.sorting or TreeLayout.alternateSorting.
since3.0