export type DefaultsChange = Readonly<Record<string, unknown>>;
type DefaultsChangeListener = (defaults: DefaultsChange) => void;
/** Merges a defaults change into an already loaded config value. */
export declare function mergeDefaultsChange<TDefaults extends object, TConfig extends {
    defaults: TDefaults;
}>(config: TConfig | undefined, defaults: DefaultsChange): TConfig | undefined;
/** Notifies config consumers about an optimistic defaults change. */
export declare function emitDefaultsChange(defaults: DefaultsChange): void;
/** Subscribes to optimistic defaults changes across React Query clients. */
export declare function onDefaultsChange(listener: DefaultsChangeListener): () => void;
export {};
//# sourceMappingURL=defaults-events.d.ts.map