/** The complete proposed or committed legend visibility snapshot for a chart dataset. */
export interface LyraChartLegendVisibilityChangeDetail{
/** Zero-based dataset index operated by the legend button. */
readonly datasetIndex:number;
/** Proposed or committed visibility of `datasetIndex`. */
readonly visible:boolean;
/** Canonical complete list of hidden zero-based dataset indexes. */
readonly hiddenDatasets:readonly number[];}
/** Complete category visibility proposal or committed snapshot for radial charts. */
export interface LyraChartDatumVisibilityChangeDetail{
/** Zero-based source category index, shared by every dataset/ring. */
readonly index:number;
/** Proposed or committed visibility of this category. */
readonly visible:boolean;
/** Complete canonical list of hidden source category indexes. */
readonly hiddenDatums:readonly number[];}
/**
* Returns a stable, bounded visibility snapshot. A defined empty array deliberately means every
* dataset is visible; `undefined` is left distinct so component configuration can supply its
* documented `dataset.hidden` default instead.
*/
export declare function normalizeHiddenDatasets(hiddenDatasets:readonly number[]|undefined,datasetCount:number):number[]|undefined;
/** Clones a canonical event detail so a listener cannot mutate the component's controlled state. */
export declare function legendVisibilityDetail(datasetIndex:number,visible:boolean,hiddenDatasets:readonly number[]):LyraChartLegendVisibilityChangeDetail;