import type { ComponentType, ElementType, ForwardRefExoticComponent, MemoExoticComponent, ReactElement } from 'react';
export declare const IS_REACT_19: boolean;
export declare const IS_REACT_20: boolean;
export declare const ForwardRef: symbol;
export declare const Memo: symbol;
export declare function isValidElementType(type: unknown): type is ElementType;
export declare function isMemo(object: unknown): object is MemoExoticComponent<ComponentType<typeof object>>;
export declare function isForwardRef(object: unknown): object is ForwardRefExoticComponent<ComponentType<typeof object>>;
export declare function isElement(object: unknown): object is ReactElement;
