export declare type BackdropAction = "loading" | "dismiss";
export declare type Handler = (event?: string) => void;
export declare type WildcardHandler = (type: BackdropAction, event?: string) => void;
export default interface Emitter {
    on(action: BackdropAction, handler: Handler): void;
    on(action: "*", handler: WildcardHandler): void;
    off(action: BackdropAction, handler: Handler): void;
    off(action: "*", handler: WildcardHandler): void;
    emit(action: BackdropAction): void;
}
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