export declare function isElement(node: Node | null): node is Element;
export declare function isHTMLInputElement(node: Node | null): node is HTMLInputElement;
export declare function isHTMLSelectElement(node: Node | null): node is HTMLSelectElement;
export declare function isHTMLTextAreaElement(node: Node | null): node is HTMLTextAreaElement;
export declare function safeWindow(node: Node): Window;
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