Function treePath

docs/app/js/sanddance-app.js:143073–143076

(name, source, target)

    return tree.root && tree.root.lookup || {};
}
function treePath(name, source, target) {
    const nodes = treeNodes(name, this), s = nodes[source], t = nodes[target];
    return s && t ? s.path(t).map(datum) : undefined;
}
function treeAncestors(name, node) {
    const n = treeNodes(name, this)[node];
    return n ? n.ancestors().map(datum) : undefined;