/**
 * RefMap is a collection of helpers for working with Refs that manage a ReadonlyMap.
 * @since 0.12.0
 */
import { Endomorphism } from 'fp-ts/Endomorphism';
import { Eq } from 'fp-ts/Eq';
import * as O from 'fp-ts/Option';
import { Predicate } from 'fp-ts/Predicate';
import * as E from './Env';
import * as EO from './EnvOption';
import * as Ref from './Ref';
/**
 * @since 0.12.0
 * @category Model
 */
export interface RefMap<E, K, V> extends Ref.Ref<E, ReadonlyMap<K, V>> {
}
/**
 * @since 0.12.0
 * @category Combinator
 */
export declare const deleteAt: <K>(Eq: Eq<K>) => (key: K) => <E, V>(rm: RefMap<E, K, V>) => EO.EnvOption<E, ReadonlyMap<K, V>>;
/**
 * @since 0.12.0
 * @category Combinator
 */
export declare function filter<A>(predicate: Predicate<A>): <E, K>(rm: RefMap<E, K, A>) => E.Env<E, ReadonlyMap<K, A>>;
/**
 * @since 0.12.0
 * @category Combinator
 */
export declare function filterWithIndex<K, V>(predicate: (k: K, v: V) => boolean): <E>(rm: RefMap<E, K, V>) => E.Env<E, ReadonlyMap<K, V>>;
/**
 * @since 0.12.0
 * @category Combinator
 */
export declare const insertAt: <K>(Eq: Eq<K>) => <V>(key: K, value: V) => <E>(rm: RefMap<E, K, V>) => EO.EnvOption<E, ReadonlyMap<K, V>>;
/**
 * @since 0.12.0
 * @category Combinator
 */
export declare const modifyAt: <K>(Eq: Eq<K>) => <V>(key: K, f: Endomorphism<V>) => <E>(rm: RefMap<E, K, V>) => EO.EnvOption<E, ReadonlyMap<K, V>>;
/**
 * @since 0.12.0
 * @category Combinator
 */
export declare const pop: <K>(Eq: Eq<K>) => (k: K) => <E, A>(rm: RefMap<E, K, A>) => E.Env<E, O.Option<A>>;
/**
 * @since 0.12.0
 * @category Combinator
 */
export declare const updateAt: <K>(Eq: Eq<K>) => <V>(key: K, value: V) => <E>(rm: RefMap<E, K, V>) => EO.EnvOption<E, ReadonlyMap<K, V>>;
/**
 * @since 0.12.0
 * @category Combinator
 */
export declare const upsertAt: <K>(Eq: Eq<K>) => <V>(key: K, value: V) => <E>(rm: RefMap<E, K, V>) => E.Env<E, ReadonlyMap<K, V>>;
/**
 * @since 0.12.1
 * @category Combinator
 */
export declare const getOrCreate: <K>(Eq: Eq<K>) => <E1, V>(key: K, create: E.Env<E1, V>) => <E2>(rm: RefMap<E2, K, V>) => E.Env<E2 & E1, V>;
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