export function maxByOrNull<T>(value: Iterable<T>, transform: (it: T) => number): T | null {
    let maxIt!: T;
    let max!: number;
    let found = false;
    for (const it of value) {
        const val = transform(it);
        if (found && val <= max) continue;
        maxIt = it;
        max = val;
        found = true;
    }
    if (!found) return null;
    return maxIt;
}