// The parent UIComponent
UIComponent parent = getParentUIComponent();
// Get the Index
Index index = (Index) desc.getEvaluatedOption(ctx, "index", parent);
// The following method should set the "key" to the node containing all
// the children... the children will also have keys which must be
// retrievable by the next method (getChildTreeNodeObjects)... these
// "keys" will be used by the rest of the methods in this file for