import { Injector, InjectOptions } from '@angular/core';
import { QueryClient } from '@tanstack/query-core';
/**
 * Injects a `QueryClient` instance and allows passing a custom injector.
 * @param injectOptions - Type of the options argument to inject and optionally a custom injector.
 * @returns The `QueryClient` instance.
 * @deprecated Use `inject(QueryClient)` instead.
 * If you need to get a `QueryClient` from a custom injector, use `injector.get(QueryClient)`.
 *
 *
 * **Example**
 * ```ts
 * const queryClient = injectQueryClient();
 * ```
 */
export declare function injectQueryClient(injectOptions?: InjectOptions & {
    injector?: Injector;
}): QueryClient;