src/vs/workbench/api/browser/mainThreadWebviews.ts/MainThreadWebviews/onDidClickLink
class MainThreadWebviews:	private onDidClickLink(handle: extHostProtocol.WebviewHandle, link: string): void {
		const webview = this.getWebview(handle);
		if (this.isSupportedLink(webview, URI.parse(link))) {
			this._openerService.open(link, { fromUserGesture: true, allowContributedOpeners: true, allowCommands: true });
		}
	}