import { ReactNode } from 'react';
export declare type Deprecated<T, PropName extends string, Explain extends string> = T extends undefined ? T : never & {
    __errorMessage: `Castle UI: ${PropName} is deprecated. ${Explain} \n Please Contact Castle UI Team for support on this issue.`;
};
export declare function isObject(value: any): value is Record<string, any>;
export declare function isFunction<T extends Function = Function>(value: any): value is T;
declare type Args<T extends Function> = T extends (...args: infer R) => any ? R : never;
declare type AnyFunction<T = any> = (...args: T[]) => any;
export declare function callAllHandlers<T extends (event: any) => void>(...fns: (T | undefined)[]): (event: Args<T>[0]) => void;
export declare function callAll<T extends AnyFunction>(...fns: (T | undefined)[]): (arg: Args<T>[0]) => void;
export declare function runIfFn<T, U>(valueOrFn: T | ((...fnArgs: U[]) => T), ...args: U[]): T;
export declare const passTestId: (props: any) => {
    'data-testid': any;
};
export declare function generateId(): string;
export declare const getReactNode: (children: ReactNode, displayNames: string[], customize?: ((child: React.ReactElement) => ReactNode) | undefined) => ReactNode;
export declare const isBrowser: boolean;
/**
 * Performs a deep equality check between two values.
 * Supports primitives, arrays, and plain objects.
 * Does not support special objects like Map, Set, Date, RegExp.
 */
export declare function deepEqual<T = unknown>(a: T, b: T): boolean;
export {};