/**
 * Maps 0–100 progress to a sub-range of a parent progress handler.
 * Supports nesting: a ScopedProgress can wrap another ScopedProgress.
 */
export class ScopedProgress {
    /**
     * @param {((pct: number) => void) | undefined} onProgress
     * @param {number} start - Start of the mapped range (0–100)
     * @param {number} end - End of the mapped range (0–100)
     */
    constructor(onProgress: ((pct: number) => void) | undefined, start: number, end: number);
    _onProgress: (pct: number) => void;
    _start: number;
    _end: number;
    callback: any;
    /** @param {number} pct - Progress 0–100 within this scope */
    report(pct: number): void;
}