import { type JSXElementConstructor, type ReactNode } from "react";
export declare function isNoneElement(node: ReactNode): boolean;
export declare function isTextElement(node: ReactNode): boolean;
export declare function isObjectElement(node?: ReactNode): boolean;
export declare function isElementOf(node?: ReactNode, type?: JSXElementConstructor<any>): boolean;
export declare const isDef: <T>(val: T) => val is NonNullable<T>;