export interface KeyBuilder {
    key: string;
    toString(): string;
    get(): string[];
    push(...parts: string[]): KeyBuilder;
    pushRoot(): KeyBuilder;
    pushIndex(index: number): KeyBuilder;
    pop(): KeyBuilder;
    shift(): KeyBuilder;
    unshift(...parts: string[]): KeyBuilder;
    clone(): KeyBuilder;
}
export declare function keyBuilder(key?: string): KeyBuilder;