/*!
 * Copyright (c) Microsoft. All rights reserved.
 */
export declare function isFunction(value: any): value is Function;
/**
 * Indicates whether the value is an actual JS Object.
 * Returns false if value is an Array or Function instance.
 */
export declare function isObject(value: any): boolean;
export declare function isDefined(value: any): boolean;
export declare function isValue(value: any): boolean;
export declare function isUndefined(value: any): boolean;
export declare function isNullOrUndefined(obj: any): boolean;
export declare function isNotNull(value: any): boolean;
export declare function isBoolean(value: any): value is boolean;
export declare function isBooleanOrNull(value: any): value is boolean;
export declare function isBooleanOrUndefined(value: any): value is boolean;
export declare function isNumber(value: any): value is number;
export declare function isNonEmptyString(value: any): value is string;
export declare function isString(value: any): value is string;
export declare function isTypeScriptEnumValue(value: any, enumType: any): boolean;
/** Checks if the value is an all-lowercase GUID. */
export declare function isGuid(value: any): boolean;
export declare function isObjectOrPureObject(value: any): boolean;
export declare type INotObject = boolean | string | number | any[] | Function;
/**
 * Determines whether the value has the property specified explicitly on itself.
 * The value may be a Pure Object or an object that derives from Object, but is not an Array or Function.
 * Returns false if the value is an array or function.
 */
export declare function hasOwnProperty<T extends Object, K extends keyof T>(obj: T, propertyName: K): boolean;
export declare function hasOwnProperty(obj: object | INotObject, propertyName: string): boolean;
export declare type IPrimitive = boolean | string | number;
/** Returns a value indicating whether the value is a string, number or boolean. */
export declare function isPrimitive(value: any): value is IPrimitive;