JED 1.6.0+ - Post-deletion command for a temp dimension

{
    "config_version": {
        "id": "__default",
        "version": 0
    },
    "dimensions": [
        {
            "dim": 99,
            "biome": "minecraft:mesa",
            "post_deletion_command": "say Dimension 99 was deleted!",
            "temporary_dimension": true,
            "dimensiontype": {
                "id": 99,
                "name": "Temp Dim 99",
                "keeploaded": false,
                "worldprovider": "WorldProviderSurfaceJED"
            },
            "worldinfo_onetime": {},
            "jed": {
                "HasXZFog": true,
                "CanDoRainSnowIce": true,
                "CloudColor": "cc3333",
                "FogColor": "cc3333",
                "SkyColor": "cc3333",
                "Colors": {
                    "FoliageColors": [ { "biome_regex": ".*",  "color": "CC3333" } ],
                    "GrassColors":   [ { "biome_regex": ".*",  "color": "CC3333" } ],
                    "WaterColors":   [ { "biome_regex": ".*",  "color": "CC3333" } ]
                }
            }
        }
    ]
}