Block JSON with custom margin sides

block.json

{
	"apiVersion": 2,
	"name": "core/group",
	"category": "design",
	"attributes": {
		"tagName": {
			"type": "string",
			"default": "div"
		},
		"templateLock": {
			"type": "string"
		}
	},
	"supports": {
		"align": [
			"wide",
			"full"
		],
		"anchor": true,
		"html": false,
		"color": {
			"gradients": true,
			"link": true
		},
		"spacing": {
			"padding": true,
			"margin": {
				"top": true,
				"right": false,
				"bottom": true,
				"left": false
			}
		},
		"__experimentalBorder": {
			"radius": true
		}
	},
	"editorStyle": "wp-block-group-editor",
	"style": "wp-block-group"
}