Ah, it seems it was updated; but I guess we want something like a sequence of name/url mapping.

Something like:
```
            "external_monitoring": {
              "type": "map",
              "required": true,
              "mapping": {
                = : {
                  "type": "map",
                  "required": true,
                  "mapping": {
                    "name": { "type": "str", "required": true },
                    "url": { "type": "str", "required": true }
                  }
```