import { Mail } from '../Mail';
import { Office } from './Office';
export interface FcmOfficeOptions {
    authorizationKey: string;
}
export interface FcmMailer {
    notifyChannel(channel?: string, data?: object, notification?: object): any;
    notifyDevices(registrationIds?: any[], data?: object, notification?: object): any;
}
export declare class FcmOffice extends Office {
    mailer: FcmMailer;
    private readonly authorizationKey;
    constructor(options: FcmOfficeOptions);
    send(mail: Mail): Promise<any>;
    private getRequestParams;
    private fcmRequest;
}