import { Entity } from './entity';
/** The class to support attributes of Entity */
export declare abstract class Attribute {
    entity: Entity;
    /** this in the index of where the attribute is positioned in the attribute array of the entity */
    bind(index: number): void;
    abstract rebind(e: Entity): void;
    /** The arguments are the underlying entity and the attribute index in the attribute array */
    constructor(entity: Entity, index: number);
    abstract clone(): Attribute;
}