export interface CollapsibleOptions {
    duration?: number;
}
/** Animates expand/collapse transitions on the host, dispatching `native:expand` and `native:collapse`. */
export declare class CollapsibleController {
    #private;
    readonly host: HTMLElement;
    duration: number;
    constructor(host: HTMLElement, options?: CollapsibleOptions);
    get collapsed(): boolean;
    set collapsed(val: boolean);
    expand(): void;
    collapse(): void;
    toggle(): void;
    destroy(): void;
}
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