import { NamedNode } from '../../ast/entity/named-node';
import { OrderField } from '../../ast/entity/order-field';
export declare class Index extends NamedNode {
    fields: OrderField[];
    constructor(fields?: OrderField[]);
    getFields(): OrderField[];
    addField(field: OrderField): void;
    find(name: string): OrderField | null;
    exists(name: string): boolean;
}