import { InjectionToken } from '@angular/core';
import { type DfId } from '../ng-draw-flow.interfaces';
import * as i0 from "@angular/core";
export type DfConnectorLayoutOrder = number | null;
export type DfNodeConnectorOrders = ReadonlyMap<DfId, ReadonlyMap<DfId, DfConnectorLayoutOrder>>;
export declare class DfConnectorOrderRegistryService {
    private readonly ordersSignal;
    readonly orders: import("@angular/core").Signal<DfNodeConnectorOrders>;
    set(nodeId: DfId, connectorId: DfId, order?: number): void;
    remove(nodeId: DfId, connectorId: DfId): void;
    static ɵfac: i0.ɵɵFactoryDeclaration<DfConnectorOrderRegistryService, never>;
    static ɵprov: i0.ɵɵInjectableDeclaration<DfConnectorOrderRegistryService>;
}
export declare const DF_CONNECTOR_ORDER_REGISTRY: InjectionToken<DfConnectorOrderRegistryService | null>;