import { Token } from '@rimbu/base';
import { EmptyBase } from '@rimbu/collection-types/map-custom';
import { OptLazy, OptLazyOr, type ToJSON } from '@rimbu/common';
import { Stream, type StreamSource } from '@rimbu/stream';
import type { ProximityMap } from '@rimbu/proximity/map';
export declare class ProximityMapEmpty<K = any, V = any> extends EmptyBase implements ProximityMap<K, V> {
    readonly context: ProximityMap.Context<K>;
    _NonEmptyType: ProximityMap.NonEmpty<K, V>;
    constructor(context: ProximityMap.Context<K>);
    streamKeys(): Stream<K>;
    streamValues(): Stream<V>;
    get<O>(_key: K, otherwise?: OptLazy<O>): O;
    hasKey(): false;
    set(key: K, value: V): ProximityMap.NonEmpty<K, V>;
    addEntry(entry: readonly [K, V]): ProximityMap.NonEmpty<K, V>;
    addEntries(entries: StreamSource<readonly [K, V]>): ProximityMap.NonEmpty<K, V>;
    removeKeyAndGet(): undefined;
    removeKey(): ProximityMap<K, V>;
    removeKeys(): ProximityMap<K, V>;
    modifyAt(atKey: K, options: {
        ifNew?: OptLazyOr<V, Token>;
    }): ProximityMap<K, V>;
    mapValues<V2>(): ProximityMap<K, V2>;
    updateAt(): ProximityMap<K, V>;
    toBuilder(): ProximityMap.Builder<K, V>;
    toString(): string;
    toJSON(): ToJSON<(readonly [K, V])[]>;
}