inRange method
Implementation
bool inRange((CherriLogLevel, CherriLogLevel) range) {
var indexA = order.indexOf(range.$1);
var indexB = order.indexOf(range.$2);
var maxIndex = math.max(indexA, indexB);
var minIndex = math.min(indexA, indexB);
return order.indexOf(this) >= minIndex && order.indexOf(this) <= maxIndex;
}