grand child: ticket_item
{
        "_index" : "program_users-2",
        "_type" : "_doc",
        "_id" : "ticket_items-2",
        "_score" : 1.0,
        "_routing" : "72-2",
        "_source" : {
          "ticket_item_id" : 2,
          "void_type_id" : null,
          "ticket_id" : 1,
          "merchant_visits" : {
            "parent" : "ticket-1-2",
            "name" : "ticket_item"
          },
          "comment" : null,
          "price_per_unit" : 599,
          "@version" : "1",
          "voided" : false,
          "updated_at" : "2019-12-04T20:28:09.395Z",
          "approving_employee_id" : null,
          "name" : "Chkn Baja Bowl",
          "updated_ts" : 1565709028221,
          "program_id" : 72,
          "merchant_id" : 273675,
          "user_id" : 2,
          "@timestamp" : "2019-12-09T05:21:07.093Z",
          "omnivore_ticket_item_id" : "2209-1",
          "menu_item_id" : "4002",
          "quantity" : 1,
          "created_ts" : 1565708857000,
          "menu_category" : "BAJA BOWL,FOOD,Bowl"
        }
      },