export declare type XMLNamespaceStr = string;
export declare class DOM {
    static removeChildNodes(element: HTMLElement): void;
    static appendChildNodes(source: HTMLElement, target: HTMLElement): void;
    static toText(element: Element, elementName: string): string | undefined;
    static toTextNS(element: Element, namespace: XMLNamespaceStr, elementName: string): string | undefined;
    static elementText(element: Element | undefined): string | undefined;
}