declare const Content_base: {
    new (): HTMLElement;
    prototype: HTMLElement;
};
export declare class Content extends Content_base {
    observer: MutationObserver;
    _shadowDom: ShadowRoot;
    _slot: HTMLElement;
    constructor();
    callback: (mutations: MutationRecord[]) => void;
    onChange: (mutation: MutationRecord) => void;
    connectedCallback(): void;
    disconnectCallback(): void;
}
declare const _default: import("@/utils/index").CustomErrorType;
export default _default;