import { RefObject } from "react";
import "./TopPart.css";
import { GridColumnGroupModel, GridColumnModel } from "../Grid";
export interface TopPartProps<T> {
    topRef: RefObject<HTMLDivElement>;
    onWheel: EventListener;
    columns: GridColumnModel<T>[];
    columnGroups: GridColumnGroupModel[];
    midGap: number;
    bottomShadow?: boolean;
}
export declare function TopPart<T>(props: TopPartProps<T>): JSX.Element;