src/vs/workbench/services/extensions/common/rpcProtocol.ts/RPCProtocol/_invokeHandler
class RPCProtocol:	private _invokeHandler(rpcId: number, methodName: string, args: any[]): Promise<any> {
		try {
			return Promise.resolve(this._doInvokeHandler(rpcId, methodName, args));
		} catch (err) {
			return Promise.reject(err);
		}
	}