src/vs/workbench/contrib/webview/browser/webviewElement.ts/WebviewElement/webviewContentEndpoint
class WebviewElement:	protected webviewContentEndpoint(encodedWebviewOrigin: string): string {
		const endpoint = this._environmentService.webviewExternalEndpoint!.replace('{{uuid}}', encodedWebviewOrigin);
		if (endpoint[endpoint.length - 1] === '/') {
			return endpoint.slice(0, endpoint.length - 1);
		}
		return endpoint;
	}