export interface StringFilter {
    [key: string]: string | string[];
}
/**
 * Covert an object of objects to object of strings.
 *
 * @example toFilterString(filter, { 'status': TagStatus })
 *
 * @param filter the filter to convert
 * @param specials an object with enum mapping
 *
 * @returns the string filter or undefined if no filter
 */
export declare function toFilterString(filter: any, specials?: {
    [key: string]: any;
}): StringFilter | undefined;
/**
 * Convert a generic enum array to string array.
 *
 * @param array the enum objects array
 * @param type the enum type
 *
 * @returns the string array
 */
export declare function enumToStringArray<T>(array: T[], type: any): string[];