export declare const hasValidParent: (hostElement: Element, requiredParents: string | string[]) => boolean;
export declare const hasValidAncestor: (hostElement: HTMLElement, requiredParents: string | string[]) => boolean;
export declare const hasValidChildren: (element: Element, allowedChildren: string | string[]) => boolean;
export declare const filterChildren: (element: Element, allowedChildren: string | string[]) => void;