/**
 * Gets the elements which are child elements of the given element.
 * If `allowVirtualChildren` is `true`, this method enumerates virtual child elements
 * after the original children.
 * @param parent - The element to get the children of.
 * @param allowVirtualChildren - true if the method should enumerate virtual child elements.
 */
export declare function getChildren(parent: HTMLElement, allowVirtualChildren?: boolean): HTMLElement[];