import Ref from '../objects/ref';
type DetachedHeadsObject = {
    heads?: string[];
    deleted?: string[];
    current?: string;
};
export declare class DetachedHeads {
    protected heads: Ref[];
    protected current?: Ref | undefined;
    protected deleted: Ref[];
    constructor(heads?: Ref[], current?: Ref | undefined, deleted?: Ref[]);
    setHead(head: Ref): void;
    getCurrent(): Ref | undefined;
    getAllHeads(): Ref[];
    /**
     * happens during reset. these heads are local, so no need to enter them into "deleted" array.
     */
    removeLocalHeads(refs: Ref[]): void;
    clearCurrent(): void;
    merge(incoming: DetachedHeads, isImport: boolean): void;
    deleteFromHeadsIfNeeded(): void;
    toObject(): DetachedHeadsObject | undefined;
    static fromObject(object?: DetachedHeadsObject): DetachedHeads;
}
export {};