import Entity from '../../entity/Entity';
import IEntity from '../../entity/IEntity';
import IRoad from '../IRoad';
/**
 * Bead road. This is the most basic road and have no streaks. It is implemented with a set which can guarantee that there are no repeated entities.
 */
declare class BeadRoad implements IRoad {
    private _set;
    private _firstEntity;
    private _lastEntity;
    private readonly _shoeIndex;
    private _entityIndex;
    private _setLastEntity;
    private _setFirstEntity;
    constructor(index: number);
    print(): string[] | string[][];
    getFirstEntity(): IEntity | undefined;
    getLastEntity(): IEntity | undefined;
    getShoeIndex(): number;
    /**
     * Add entity to the bead road.
     * @param {Entity} entity
     * @return {boolean} True if the entity was added, false if it was not
     */
    addEntity(entity: Entity): boolean;
    /**
     * The number of entities in the road.
     * @return {number} The number of entities in the road
     */
    getSize(): number;
}
export default BeadRoad;