src/vs/workbench/contrib/extensions/browser/extensionsWorkbenchService.ts/Extension/url
class Extension:	get url(): string | undefined {
		if (!this.productService.extensionsGallery || !this.gallery) {
			return undefined;
		}

		return `${this.productService.extensionsGallery.itemUrl}?itemName=${this.publisher}.${this.name}`;
	}