@Override
public int hashCode() {
final int prime = 31;
int result = 1;
result = prime * result + ((pk == null) ? 0 : pk.hashCode());
return result;
}
@Override
public boolean equals(Object obj) {
if (this == obj) return true;
if (obj == null) return false;
if (getClass() != obj.getClass()) return false;
FieldOptionMap other = (FieldOptionMap) obj;
if (pk == null) {
if (other.pk != null) return false;
} else if (!pk.equals(other.pk)) return false;
return true;
}