export declare enum OSNotificationPermission {
    NotDetermined = 0,
    Denied = 1,
    Authorized = 2,
    Provisional = 3,
    Ephemeral = 4
}
export interface PushSubscriptionState {
    id?: string;
    token?: string;
    optedIn: boolean;
}
export interface PushSubscriptionChangedState {
    previous: PushSubscriptionState;
    current: PushSubscriptionState;
}