import type { CSSResultGroup } from 'lit';
import SynergyElement from '../../internal/synergy-element.js';
import SynDivider from '../divider/divider.component.js';
import type SynOption from '../option/option.component.js';
/**
 * @summary The <syn-optgroup> element creates a grouping for <syn-option>s within a <syn-select>.
 * @documentation https://synergy-design-system.github.io/?path=/docs/components-syn-optgroup--docs
 * @status stable
 * @since 1.3.0
 *
 * @dependency syn-divider
 *
 * @slot - The given options. Must be `<syn-option>` elements.
 * @slot prefix - A presentational prefix icon or similar element.
 * @slot label - The label for the optgroup
 * @slot suffix - A presentational suffix icon or similar element.
 *
 * @csspart base - The component's base wrapper.
 * @csspart label-container - The container that wraps prefix, label and base
 * @csspart divider - The divider that is displayed above the content
 * @csspart prefix - The container that wraps the prefix.
 * @csspart suffix - The container that wraps the suffix.
 * @csspart options - The container that wraps the <syn-option> elements.
 *
 * @cssproperty --display-divider - Display property of the divider. Defaults to "block"
 */
export default class SynOptgroup extends SynergyElement {
    static styles: CSSResultGroup;
    static dependencies: {
        'syn-divider': typeof SynDivider;
    };
    private readonly hasSlotController;
    private mutationObserver;
    private enableObserver;
    assignedOptions: SynOption[];
    /**
     * Disables all options in the optgroup.
     */
    disabled: boolean;
    /**
     * The optgroups label. If you need to display HTML, use the `label` slot instead.
     */
    label: string;
    connectedCallback(): void;
    render(): import("lit").TemplateResult;
}