WordPress/wp-includes/blocks/missing/block.json

{
	"name": "core/missing",
	"category": "text",
	"attributes": {
		"originalName": {
			"type": "string"
		},
		"originalUndelimitedContent": {
			"type": "string"
		},
		"originalContent": {
			"type": "string",
			"source": "html"
		}
	},
	"supports": {
		"className": false,
		"customClassName": false,
		"inserter": false,
		"html": false,
		"reusable": false
	}
}