import { EventEmitter } from '@angular/core';
import * as i0 from "@angular/core";
export declare class OptionalColumnsComponent {
    optionalCols: any[];
    columnsChanged: EventEmitter<string[]>;
    selectedColumns: any;
    onColumnsChange(): void;
    static ɵfac: i0.ɵɵFactoryDeclaration<OptionalColumnsComponent, never>;
    static ɵcmp: i0.ɵɵComponentDeclaration<OptionalColumnsComponent, "lib-optional-columns", never, { "optionalCols": { "alias": "optionalCols"; "required": false; }; }, { "columnsChanged": "columnsChanged"; }, never, never, false, never>;
}