src/vs/workbench/api/browser/mainThreadWebviews.ts/MainThreadWebviews/isSupportedLink
class MainThreadWebviews:	private isSupportedLink(webview: IWebview, link: URI): boolean {
		if (MainThreadWebviews.standardSupportedLinkSchemes.has(link.scheme)) {
			return true;
		}

		if (!isWeb && this._productService.urlProtocol === link.scheme) {
			return true;
		}

		if (link.scheme === Schemas.command) {
			if (Array.isArray(webview.contentOptions.enableCommandUris)) {
				return webview.contentOptions.enableCommandUris.includes(link.path);
			}

			return webview.contentOptions.enableCommandUris === true;
		}

		return false;
	}