type Interval = {
    start: number;
    end: number;
};
/**
 * Simple interval set data structure.
 *
 * This class has a preference for append ranges at the end. This is because when `dataSelection.ts` loops through
 * hit-tested nodes, it typically loops in a way that keeps the datum-indices ordered from smallest to largest (although
 * this is not actually guaranteed).
 *
 * There's no guarantee that none of the generated `values()` intervals overlap; This is intentional to avoid some
 * potentionally unnecessary mutations to the internal interval-set array.
 *
 * `start` and `end` are both inclusive.
 */
export declare class IntervalSet {
    private readonly intervals;
    add(start: number, end: number): void;
    has(index: number): boolean;
    values(): Iterable<Interval>;
    clear(): void;
}
export {};