findMinDate method

DateTime? findMinDate(
  1. int year,
  2. int month
)

Implementation

DateTime? findMinDate(int year, int month) {
  DateTime? start;
  _nodeMap.forEach((key, value) {
    if (key.year == year && key.month == month) {
      if (start == null) {
        start = key;
      } else {
        if (key.isBeforeDay(start!)) {
          start = key;
        }
      }
    }
  });

  return start;
}