src/vs/workbench/services/extensions/common/rpcProtocol.ts/RPCProtocol/_receiveCancel
class RPCProtocol:	private _receiveCancel(msgLength: number, req: number): void {
		this._logger?.logIncoming(msgLength, req, RequestInitiator.OtherSide, `receiveCancel`);
		const callId = String(req);
		this._cancelInvokedHandlers[callId]?.();
	}