Get issue navigator default columns

{
  "type": "array",
  "items": {
    "type": "object",
    "description": "Details of an issue navigator column item.",
    "properties": {
      "label": {
        "type": "string",
        "description": "The issue navigator column label."
      },
      "value": {
        "type": "string",
        "description": "The issue navigator column value."
      }
    },
    "additionalProperties": false
  }
}