Solr Hierachical Facet plugin support multiple node ID

example:
{ "id": "1", "node_id": "A", "child_ids": [ "AA"], "name": "NodeA", "label": "nodeA" }
{ "id": "2", "node_id": "B", "child_ids": [ "BB"], "name": "NodeB", "label": "nodeB" }
{ "id": "3", **"node_id": "AA", "node_id": "BB"**, "child_ids": [ ], "name": "NodeAABB", "label": "nodeAABB" }