export declare class DefineApplet extends HTMLElement {
    constructor();
    private installed;
    appletSlot: HTMLSlotElement;
    getViewSlot(): HTMLSlotElement;
    static get observedAttributes(): string[];
    private get appletId();
    private defineApplet;
    attributeChangedCallback(name: string, oldValue: string, newValue: string): void;
    connectedCallback(): void;
}