import { CSSResultGroup, PropertyValues, TemplateResult } from 'lit';
import { SbbElement } from '../core/base-elements.ts';
declare const SbbSelectionExpansionPanelElement_base: import('../core/mixins.ts').AbstractConstructor<import('../core/mixins.ts').SbbSelectionPanelMixinType & import('../core/mixins.ts').SbbElementInternalsMixinType> & typeof SbbElement;
/**
 * It displays an expandable panel connected to a `sbb-checkbox` or to a `sbb-radio-button`.
 *
 * @slot - Use the unnamed slot to add `sbb-checkbox-panel` or `sbb-radio-button-panel` elements to the `sbb-selection-expansion-panel`.
 * @slot content - Use this slot to provide custom content for the panel (optional).
 */
export declare class SbbSelectionExpansionPanelElement extends SbbSelectionExpansionPanelElement_base {
    static readonly elementName: string;
    static styles: CSSResultGroup;
    static readonly events: {
        readonly beforeopen: "beforeopen";
        readonly open: "open";
        readonly beforeclose: "beforeclose";
        readonly close: "close";
    };
    /** Whether the content section is always visible. */
    accessor forceOpen: boolean;
    /** The state of the component. */
    private set _state(value);
    private get _state();
    private _stateInternal;
    private _language;
    /** Whether it has an expandable content */
    private get _hasContent();
    constructor();
    protected willUpdate(changedProperties: PropertyValues<this>): void;
    protected onInputStateChange(): void;
    private _updateState;
    private _open;
    private _close;
    private _isZeroAnimationDuration;
    private _handleClosing;
    private _handleOpening;
    private _onAnimationEnd;
    private _updateExpandedLabel;
    protected render(): TemplateResult;
}
declare global {
    interface HTMLElementTagNameMap {
        'sbb-selection-expansion-panel': SbbSelectionExpansionPanelElement;
    }
}
export {};
//# sourceMappingURL=selection-expansion-panel.component.d.ts.map