fnd_push
err = fnd_push(fnd, node, e);
fnd_push(fnd, n, e);
fnd_push(fnd, n, e);
fnd_push(fnd, n, e);
fnd_push(fnd, n, e);
fnd_push(fnd2, n, e);
fnd_push(fnd, in, NULL);
fnd_push(fnd, fnd2->nodes[level], fnd2->de[level]);