minecraft-bedrock-json-schemas/source/resource/ui/elements/properties/checked_locked_control.json

{
  "title": "Checked Locked Control",
  "description": "The control that will be checked when locked.",
  "anyOf": [
    {
      "enum": ["checked"]
    },
    {
      "$ref": "../../general/item_ref.json"
    }
  ]
}