@Override
public boolean equals(Object o) {
if (this == o) return true;
if (o == null || getClass() != o.getClass()) return false;
Pair pair = (Pair) o;
return day.equals(pair.day) && unit.equals(pair.unit);
}
@Override
public int hashCode() {
int result = day.hashCode();
result = 31 * result + unit.hashCode();
return result;
}