import type { DropdownOption } from "../option/index.js";
/**
 * Predicate function that determines if the element should be considered an option group.
 * Uses duck-typing by checking for the presence of an `options` array property
 * rather than relying on the tag name, making it prefix-agnostic.
 *
 * @param element - The element to check.
 * @returns true if the element is an option group.
 * @public
 */
export declare function isOptionGroup(element?: Element | null): element is OptionGroup;
/**
 * Gets the dropdown options from an element, handling both direct options and option groups.
 *
 * @param element - The element to extract options from.
 * @returns An array of DropdownOption elements.
 * @public
 */
export declare function getOptionsFromElement(element: Element): DropdownOption[];
import type { OptionGroup } from "./option-group.js";
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