import { nat } from "./primitives.js";
import { Hash } from "./things.js";
export declare class HashMap<K, V> implements Iterable<[K, V]> {
    #private;
    constructor(hash: Hash<K>);
    [Symbol.iterator](): Iterator<[K, V]>;
    put(key: K, value: V): V | undefined;
    putIfNew(key: K, value: () => V): V;
    get(key: K): V | undefined;
    has(key: K): boolean;
    remove(key: K): V | undefined;
    get size(): nat;
    keys(): K[];
}