import type * as Types from './types'; export declare function installFCM(config: Types.ClientConfig): Promise; export declare function registerFCM(gcmData: Types.GcmData, installation: Types.InstallationData, keys: Types.Keys, config: Types.ClientConfig): Promise; export default function register(gcm: Types.GcmData, keys: Types.Keys, config: Types.ClientConfig): Promise;