/**
 * Distributes rings across the `[bandInner, bandOuter]` radius band proportionally to their
 * relative `ringWidths` (ring 0 = innermost), leaving a proportional `gapRatio` of spacing
 * between consecutive rings (none before the first).
 *
 * Widths are treated as ratios, not pixels: the same `ringWidths` fill whatever band size they
 * are given, so passing a band derived from the chart's resolved (percentage) radii makes the
 * rings scale with the container.
 *
 * @param gapRatio - gap between rings as a fraction of the average ring width. Defaults to 0.2,
 *   approximating recharts' own default ring spacing.
 */
export default function getRingRadii(bandInner: number, bandOuter: number, ringWidths: number[], gapRatio?: number): {
    innerRadius: number;
    outerRadius: number;
}[];