import type { Entity } from "../../entities";
import { Field } from "../Field";
export declare class EntityIndex {
    entity: Entity;
    fields: Field[];
    unique: boolean;
    name?: string | undefined;
    constructor(entity: Entity, fields: Field[], unique?: boolean, name?: string | undefined);
    toJSON(): {
        entity: string;
        fields: string[];
        unique: boolean;
    };
}