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

{
	"apiVersion": 2,
	"name": "core/separator",
	"title": "Separator",
	"category": "design",
	"description": "Create a break between ideas or sections with a horizontal separator.",
	"keywords": [ "horizontal-line", "hr", "divider" ],
	"textdomain": "default",
	"attributes": {
		"color": {
			"type": "string"
		},
		"customColor": {
			"type": "string"
		}
	},
	"supports": {
		"anchor": true,
		"align": [ "center", "wide", "full" ]
	},
	"styles": [
		{ "name": "default", "label": "Default", "isDefault": true },
		{ "name": "wide", "label": "Wide Line" },
		{ "name": "dots", "label": "Dots" }
	],
	"editorStyle": "wp-block-separator-editor",
	"style": "wp-block-separator"
}