import type { RadialItemTooltipContext, RadialItemTooltipParams } from './radial-item-tooltip.types';
/**
 * Build radial ring tooltip params from an ECharts `showTip` payload.
 * Only the filled arc (`dataIndex` 0) is shown; the background track is ignored.
 */
export declare function radialItemParamsFromShowTip(chart: any, evt: any, ctx: RadialItemTooltipContext, themeSeries: Array<{
    color: string;
}>): RadialItemTooltipParams | null;
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