@Override
public boolean equals(Object o) {
if (this == o) return true;
if (!(o instanceof IdEquation)) return false;
IdEquation equation = (IdEquation) o;
if (id != equation.id) return false;
if (!rhs.equals(equation.rhs)) return false;
return true;
}
@Override
public int hashCode() {
return 31 * ((int) (id ^ (id >>> 32))) + rhs.hashCode();
}