import HeatmapOptions from './HeatmapOptions';
/**
 * Implementation of the 'heatmap' markup element.
 */
export declare class Heatmap {
    private options;
    private itemSizeX;
    private itemSizeY;
    private cellSizeX;
    private cellSizeY;
    private width;
    private height;
    private margin;
    constructor(options?: HeatmapOptions);
    /**
     * @inheritDoc
     */
    render(): HTMLElement;
    init(element: HTMLElement): void;
    private renderAxis;
    private renderColor;
    private renderRects;
}