Method set

packages/core/ui/core/properties/index.ts:1292–1296

(value: string)

			enumerable: false,
			configurable: true,
			set(value: string) {
				converter(value).forEach(([property, value]) => {
					this[property.cssLocalName] = value;
				});
			},
		};

		cssSymbolPropertyMap[key] = this;