import * as E from "fp-ts/Either";
import { RequestStaticFilters } from "../../interfaces";
interface Sized {
    length: number;
}
export declare const isEmpty: (x: Sized) => boolean;
export declare const existAndNotEmpty: <T extends Sized>(x: T) => E.Either<string, T>;
export declare const arrayToQueryString: (params: string[]) => string;
export declare const parseStringToExcluded: (value: string) => RequestStaticFilters["excluded"];
export declare const addIfDefined: <T>(key: string, value: T | null | undefined) => Partial<Record<string, T>>;
export declare const addIfNotEmpty: <T extends {
    length: number;
} | object>(key: string, value: T | null | undefined) => Partial<Record<string, T>>;
export declare const addNestedIfNotEmpty: <T>(key: string, nested: Partial<Record<string, T>> | undefined) => Partial<Record<string, Partial<Record<string, T>>>>;
export {};