import type { CartesianChart } from "./cartesian";
/**
 * Build the per-row tooltip for a point-style glyph (scatter, gradient
 * heatmap). Resolves the source arrow row via the chart's lazy row
 * fetcher, then surfaces every non-null column under the (split-aware)
 * prefix filter formatted by column type.
 *
 * Returns `[]` when the chart has no row-index mirror or no fetcher;
 * callers should fall back to a geometry-only tooltip in that case.
 */
export declare function buildPointRowTooltipLines(chart: CartesianChart, flatIdx: number): Promise<string[]>;