import { Constructor } from './types';
export declare const isNull: (input: unknown) => input is null;
export declare const isUndefined: (input: unknown) => input is undefined;
export declare const isNil: (input: unknown) => input is null | undefined;
export declare const getConstructor: <T = unknown>(value: unknown) => T | undefined;
export declare const isObject: (value: unknown) => boolean;
export declare const isNumber: (input: unknown) => input is number;
export declare const isString: (input: unknown) => input is string;
export declare const isBoolean: (input: unknown) => input is boolean;
export declare const isFunction: (input: unknown) => input is Function;
export declare const isArray: (input: unknown) => input is unknown[];
export declare const isInstanceOf: (value: unknown, constructor: Constructor<unknown>) => boolean;
export declare const isPrototypeOf: (value: Object, object: Constructor<unknown>) => boolean;
export declare const noop: (..._: unknown[]) => void;
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