export declare const EmptyString = "";
/**
 * Indicates whether the string is null or empty.
 * @param text
 */
export declare function isNullOrEmpty(text: string | null | undefined): text is null | undefined | "";
/**
 * Indicates whether an element is a javascript object.
 * @param item
 */
export declare function isObject(item: unknown): item is Record<string, unknown>;
/**
* Merges an object with others, including sub-properties.
* @param target
* @param sources
*/
export declare function mergeDeep(target: Record<string, unknown>, ...sources: unknown[]): Record<string, unknown>;
/**
 * Determines if an item is a promise.
 * @param object
 * @returns
 */
export declare function isPromise(object: any): object is Promise<any>;
/**
 * Remove {} of a guid
 * @param id
 */
export declare function formatId(id: string): string;
/**
 * Indicates if the 2 Guid are identical.
 * @param id1 Guid 1
 * @param id2 Guid 2
 */
export declare function isSameId(id1: string, id2: string): boolean;
/**
 * Indicate if the object has the method.
 * @param obj Object
 * @param methodName Method name.
 * @returns true or false
 */
export declare function hasMethod(obj: Record<string | symbol, any>, methodName: string): boolean;
/**
 * Gets all methods of an object (prototype include).
 * @param obj
 * @returns
 */
export declare function getMethods(obj: Record<string | symbol, any>): string[];