setThresholdOfDaysSinceHit method
Implementation
void setThresholdOfDaysSinceHit(int thresholdOfDaysSinceHit) {
if (!(thresholdOfDaysSinceHit >= 0)) {
throw ArgumentError("thresholdOfDaysSinceHit must not be negative");
}
this.thresholdOfDaysSinceHit = thresholdOfDaysSinceHit;
}