divkit/compat_data/div-container.json

{
    "features": [{
        "id": "container_item_builder",
        "name": "Container property <code>item_builder</code>",
        "compat": {
            "android": {
                "version_added": "29.12.0"
            },
            "ios": {
                "version_added": "29.0.0"
            },
            "web": {
                "version_added": "29.4.0"
            }
        }
    }]
}