/**
 * A Map that uses deep equality to check for key existence.
 * Important if you want to distinguish between objects that serialization does not differentiate.
 *
 * Note performance potentially degrades when the number of entries increases
 * as it has to iterate through all keys if the key isnt immediately in the underlying map.
 */
export declare class DequalMap<K extends object, V> extends Map<K, V> {
    private _keys;
    constructor(entries?: ReadonlyArray<readonly [K, V]> | null);
    findKey(key: K): K | undefined;
    set(key: K, value: V): this;
    /** Identical to calling this.set but returns the value instead of this. */
    setReturnValue(key: K, value: V): V;
    get(key: K): V | undefined;
    has(key: K): boolean;
    delete(key: K): boolean;
    clear(): void;
}
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