import { ElementRef, Injector } from '@angular/core';
import { Overlay } from '@angular/cdk/overlay';
import { StepDetailsModalRef } from './step-details-modal-ref';
import { StepDetailsModalData } from './step-details-modal-data';
import * as i0 from "@angular/core";
export declare class StepDetailsModalService {
    private readonly overlay;
    private readonly injector;
    /** Currently open Step Details overlay ref; only one panel is allowed at a time. */
    private currentRef;
    constructor(overlay: Overlay, injector: Injector);
    /**
     * Opens the Step Details modal positioned just below the given origin element.
     * If a panel is already open, returns the existing ref and does not open a duplicate.
     * @param origin Element (e.g. "View Details" link) to position below
     * @param data Title and description to display
     * @returns Ref with afterClosed() and close()
     */
    open(origin: ElementRef<HTMLElement>, data: StepDetailsModalData): StepDetailsModalRef<void>;
    static ɵfac: i0.ɵɵFactoryDeclaration<StepDetailsModalService, never>;
    static ɵprov: i0.ɵɵInjectableDeclaration<StepDetailsModalService>;
}