export declare function isElement(e: Node | undefined | null): e is Element;
export declare function isAttribute(e: Node | undefined | null): e is Attr;
export declare function isText(e: Node | undefined | null): e is Text;
export declare function isCData(e: Node | undefined | null): e is CDATASection;
export declare function isDocument(e: Node | undefined | null): e is Document;
export declare function isFragment(e: Node | undefined | null): e is DocumentFragment;
export declare function isProcessingInstruction(e: Node | undefined | null): e is ProcessingInstruction;
export declare function isNamespaceNode(e: Node | undefined | null): e is Attr;
export declare function isNSResolver(r: any): r is XPathNSResolver;