 ["value"],
              "as": ["child"]
            }
          ]
        },
        {
          "name": "filter-tree",
          "source": "tree",
          "transform": [
            {
              "type": "filter",
              "expr": "!length(data('selected'))|| indata('filtered-aggregate', 'id', datum.id) || indata('selected-ancestors-fold', 'treeAncestors.id', datum.id)"
            },
            { "key": "id", "parentKey": "parent", "type": "stratify" },
            {
              "as": ["a0",