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

{
	"apiVersion": 2,
	"name": "core/column",
	"title": "Column",
	"category": "text",
	"parent": [ "core/columns" ],
	"description": "A single column within a columns block.",
	"textdomain": "default",
	"attributes": {
		"verticalAlignment": {
			"type": "string"
		},
		"width": {
			"type": "string"
		},
		"templateLock": {
			"enum": [ "all", "insert", false ]
		}
	},
	"supports": {
		"anchor": true,
		"reusable": false,
		"html": false
	}
}