import { LegendItemExtraValues , LegendItem } from '../../common/legend' ; internal export function getExtra ( extraValues , item , totalItems ) { const { seriesIdentifiers , defaultExtra , childId , path } = item ; if ( extraValues . size === 0 || seriesIdentifiers . length > 1 ) { return defaultExtra ?. formatted ?? '' ; } const [ { key } ] = seriesIdentifiers ; const extraValueKey = path . map ( ( { index } ) => index ) . join ( '__' ) ; const itemExtraValues = extraValues . has ( extraValueKey ) ? extraValues . get ( extraValueKey ) : extraValues . get ( key ) ; const actionExtra = childId !== undefined && itemExtraValues ?. get ( childId ) ; return actionExtra ?? ( extraValues . size === totalItems ? defaultExtra ?. formatted : null ) ?? '' ; }