export type SubsetSizeOption = number | 'sqrt' | 'log2' | 'all';
/**
 * Resolve a max_features / max_samples style option to an absolute count.
 *
 * JavaScript cannot distinguish the integer 1 from the float 1.0, so sklearn's
 * "int means count, float means fraction" convention is not portable. The
 * library-wide convention is:
 *   - integer n >= 1      -> absolute count (capped at total)
 *   - 0 < x < 1           -> fraction, max(1, floor(x * total))
 *   - 'sqrt' / 'log2'     -> max(1, floor(sqrt/log2(total)))
 *   - 'all' / undefined   -> total
 * Everything else (0, negatives, NaN, non-integer > 1) throws.
 *
 * NOTE: `1` therefore means ONE feature/sample, not 100% — use 'all' for the
 * full set.
 */
export declare function resolveSubsetSize(option: SubsetSizeOption | undefined, total: number, paramName?: string): number;