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

{
	"apiVersion": 2,
	"name": "core/columns",
	"category": "design",
	"attributes": {
		"verticalAlignment": {
			"type": "string"
		}
	},
	"supports": {
		"anchor": true,
		"align": [
			"wide",
			"full"
		],
		"html": false,
		"color": {
			"gradients": true,
			"link": true
		}
	},
	"editorStyle": "wp-block-columns-editor",
	"style": "wp-block-columns"
}