import { NameSapceType } from '../Container/Container';
/**
 * Raises error with a message when callback is not
 * a function.
 */
export declare function ensureIsFunction(callback: Function, message: string): void;
/**
 * Returns a function telling if value is a class or not
 */
export declare function isClass(fn: any): boolean;
/**
 * Returns a boolean to differentiate between null and objects
 * and arrays too
 */
export declare function isObject(value: any): boolean;
/**
 * Returns a function telling if value is a class or not
 */
export declare function isFuntion(value: any): boolean;
/**
 * Returns a boolean telling if value is an esm module
 * with `export default`.
 */
export declare function isEsm(value: any): boolean;
/**
 * Returns a boolean telling if value is a primitive or object constructor.
 */
export declare function isPrimtiveConstructor(value: any): boolean;
/**
 * Return a string of namespace type
 *
 * @param namespace
 */
export declare function namespaceToString(namespace: NameSapceType): string;