export declare function saveTrace<T>(enabled: boolean, action: () => Promise<T>): Promise<T>;
/**
 * Inspect the call stack to find the nearest Receiver/Sender subclass
 * and log the source line that invoked receive.
 */
export declare function trace(type: "Receiver" | "Sender"): string | undefined;
//# sourceMappingURL=trace.d.ts.map