import { InjectionToken } from '@angular/core';
import { HjFn } from '../types/hj';
/**
 * Check if there is some global function called gtag on Window object, or create an empty function to doesn't brake codes...
 */
export declare function getHjFn(window: Window & {
    hj?: HjFn;
}): HjFn;
/**
 * Provides an injection token to access Google Analytics Gtag Function
 */
export declare const NGX_HJ_FN: InjectionToken<HjFn>;