import { RenderContext } from './RenderContext';
/**
 * Paints spanning (merged) cells on top of the normal rows. Each distinct span
 * is drawn once at its origin, sized to cover its whole range, so a span whose
 * origin scrolled above the viewport still fills the visible part. The body
 * renderer skips any cell that falls inside a span, leaving this layer to own it.
 */
export declare class MergeRenderer {
    private layer;
    private cells;
    private active;
    constructor(layer: HTMLElement);
    render(ctx: RenderContext): void;
    clear(): void;
    private renderSpan;
}