import type { Comparator, SonicMap } from '../types';
export declare class LlrbNode<K, V> {
    readonly k: K;
    v: V;
    b: boolean;
    p: LlrbNode<K, V> | undefined;
    l: LlrbNode<K, V> | undefined;
    r: LlrbNode<K, V> | undefined;
    constructor(k: K, v: V, b: boolean);
}
export declare class LlrbTree<K, V> implements SonicMap<K, V, LlrbNode<K, V>> {
    readonly comparator: Comparator<K>;
    min: LlrbNode<K, V> | undefined;
    root: LlrbNode<K, V> | undefined;
    max: LlrbNode<K, V> | undefined;
    protected _size: number;
    constructor(comparator?: Comparator<K>);
    set(k: K, v: V): LlrbNode<K, V>;
    private _fixRRB;
    private _fixBRR;
    private _fixBBR;
    private _fix;
    find(k: K): LlrbNode<K, V> | undefined;
    get(k: K): V | undefined;
    del(k: K): boolean;
    clear(): void;
    has(k: K): boolean;
    size(): number;
    isEmpty(): boolean;
    getOrNextLower(k: K): LlrbNode<K, V> | undefined;
    forEach(fn: (node: LlrbNode<K, V>) => void): void;
    first(): LlrbNode<K, V> | undefined;
    last(): LlrbNode<K, V> | undefined;
    readonly next: <N extends import("../types").HeadlessNode>(curr: N) => N | undefined;
    iterator0(): () => undefined | LlrbNode<K, V>;
    iterator(): Iterator<LlrbNode<K, V>>;
    entries(): IterableIterator<LlrbNode<K, V>>;
    toString(tab: string): string;
}