### Mutation
Store a GeoJSON `FeatureCollection` for Cologne Trade Fair parking lots using the `storeGroupValue` mutation.

```graphql
mutation StoreParkingGeoJSON($locator: GroupValueLocator!, $value: JSONObject!) {
  storeGroupValue(locator: $locator, value: $value) {
    itemid
    error { message }
  }
}
```

### Variables
```json
{
  "locator": {
    "groupName": "Roadwork/CologneTradeFair",
    "valueType": "FeatureCollection",
    "key": "geometry.areas.parking"
  },
  "value": {
    "type": "FeatureCollection",
    "features": [
      {
        "type": "Feature",
        "properties": { "name": "P22", "type": "parking lot", "operator": "Koelnmesse", "ref": "P22", "source": "OpenStreetMap", "website": "https://www.koelnmesse.de/", "updatedAt": "2026-02-19T00:00:00Z" },
        "geometry": { "type": "Polygon", "coordinates": [[[6.9812, 50.9469], [6.9823, 50.9467], [6.9820, 50.9459], [6.9810, 50.9461], [6.9812, 50.9469]]] }
      },
      {
        "type": "Feature",
        "properties": { "name": "P21", "type": "parking lot", "operator": "Koelnmesse", "ref": "P21", "source": "OpenStreetMap" },
        "geometry": { "type": "Polygon", "coordinates": [[[6.9800, 50.9476], [6.9810, 50.9473], [6.9809, 50.9468], [6.9798, 50.9470], [6.9800, 50.9476]]] }
      },
      {
        "type": "Feature",
        "properties": { "name": "P32", "type": "parking lot", "operator": "Koelnmesse", "ref": "P32", "source": "OpenStreetMap" },
        "geometry": { "type": "Polygon", "coordinates": [[[6.9835, 50.9438], [6.9843, 50.9436], [6.9841, 50.9430], [6.9833, 50.9432], [6.9835, 50.9438]]] }
      }
    ]
  }
}
```

### Verification Query
Verify the stored GeoJSON using the `getGroupValue` query.

```graphql
query VerifyParkingGeoJSON($locator: GroupValueLocator!) {
  getGroupValue(locator: $locator)
}
```

Alternatively, verify by querying the host and its items:

```graphql
query VerifyParkingGeoJSONAlt($hostPattern: String!) {
  allHosts(name_pattern: $hostPattern) {
    host
    ... on ZabbixHost {
      tags
    }
    items {
      name
      key_
      lastvalue
      lastclock
    }
  }
}
```