{
  "any_argument": true,
  "arguments": {},
  "id": "Union",
  "name": "union",
  "options": {
    "flatten": {
      "type_proto": "bool",
      "type_rust": "bool",
      "default_python": "True",
      "description": "When set, the output is an array. When unset, the output is an indexmap of arrays."
    }
  },
  "return": {
    "type_value": "Array",
    "description": "Array (or indexmap of arrays) containing item(s) representing the concatenation of all partitions"
  },
  "description": "Union the arrays in the arguments into one array.",
  "proto_id": 62
}