import { NgbModalOptions } from '@ng-bootstrap/ng-bootstrap';
interface ModalOptions extends NgbModalOptions {
    isShowFooter?: boolean;
    isShowHeader?: boolean;
    positiveButton?: string;
    negativeButton?: string | null;
    theme?: 'warning' | 'error' | 'default';
    preImg?: string | null;
    isShowCloseButton?: boolean;
}
export declare class ModalConfig {
    options: ModalOptions;
    constructor(options?: ModalOptions);
}
export {};