export function minByOrNull<T>(value: Iterable<T>, transform: (it: T) => number): T | null {
    let minIt!: T;
    let minVal: number | undefined;
    for (const it of value) {
        const val = transform(it);
        if (minVal === undefined || val < minVal) {
            minIt = it;
            minVal = val;
        }
    }
    if (minVal === undefined) return null;
    return minIt;
}