/**
 * check if the input is undefined or null
 * @param input - input pointer
 * @returns true undefined or null
 */
export declare function undefinedOrNull(input: any): boolean;
/**
 * check if the input is defined and not null
 * @param input - input pointer
 * @returns true defined and not null
 */
export declare function definedAndNotNull(input: any): boolean;