import type { NullishReturn, TypeCheckFunction } from './private-types';
export declare function isNullish(value: unknown): value is NullishReturn;
export declare const isNumber: TypeCheckFunction<number>;
export declare const isObject: TypeCheckFunction<object | null>;
export declare const isFunction: TypeCheckFunction<CallableFunction>;
type UnknownArray = unknown[] | readonly unknown[];
export declare const isArray: TypeCheckFunction<UnknownArray>;
export declare const isFiniteNumber: {
    (value: number): boolean;
    (value: unknown): value is number;
};
export {};
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