export type StackedBarDataRecord<D> = {
    datum: D;
    index: number;
    stacked: [number, number];
    stackIndex: number;
    /** The segment tops off its stack, so its far edge is a free end */
    isEnding: boolean;
    /** No other segment of the group ends where this one begins, so its near edge is a free end */
    isStarting: boolean;
};