private static <E> void dependencyObjectifyHelper(
Tree t, Tree root, HeadFinder hf, Collection<E> c, DependencyTyper<E> typer) {
if (t.isLeaf() || t.isPreTerminal()) {
return;
}
Tree headDtr = hf.determineHead(t);
for (Tree child : t.children()) {
dependencyObjectifyHelper(child, root, hf, c, typer);
if (child != headDtr) {
c.add(typer.makeDependency(headDtr, child, root));
}
}
}