export interface GtagConfigOptions {
    send_page_view?: boolean;
    transport_type?: 'beacon' | 'xhr' | 'image';
    groups?: string;
    [prop: string]: any;
}
/**
 * Only injects the google analytics gtag lib without calling config.
 * @param trackingId The ga tracking id.
 */
export declare function onlyInstallGtag(trackingId: string): void;
/**
 * Injects the google analytics gtag lib.
 * @param trackingId The ga tracking id.
 * @param options The options to configure.
 */
export declare function installGtag(trackingId: string, options?: GtagConfigOptions): void;
export declare function gtagRaw(...params: any[]): void;
export declare function gtag(command: 'config', trackingId: string, options?: GtagConfigOptions): void;
export declare function gtag(command: 'set', options: any): void;
export declare function gtag(command: 'event', action: 'page_view', options?: {
    page_title?: string;
    page_location?: string;
    page_path?: string;
    send_to?: string;
}): void;
export declare function gtag(command: 'event', action: 'exception', options?: {
    description?: string;
    fatal?: boolean;
}): void;
export declare function gtag(command: 'event', action: string, options?: any): void;