import { DebugEventArg } from '@urql/core';
export declare const createDebugMessage: <T extends string>(debug: DebugEventArg<T>) => {
    readonly type: "debug-event";
    readonly source: "exchange";
    readonly data: {
        type: T;
        message: string;
        operation: import("@urql/core").Operation<any, any>;
    } & (T extends "cacheHit" | "cacheInvalidation" | "fetchRequest" | "fetchSuccess" | "fetchError" | "retryRetrying" | "teardown" | "execution" | "update" | "error" ? {
        data: import("@urql/core").DebugEventTypes[T];
    } : {
        data?: any;
    }) & {
        readonly source: "devtoolsExchange";
        readonly timestamp: number;
    };
};