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

{
  "title": "Unchecked Hover Control",
  "description": "The control that will be unchecked when hovered.",
  "anyOf": [
    {
      "enum": ["unchecked"]
    },
    {
      "$ref": "../../general/item_ref.json"
    }
  ]
}