@Override
  public boolean equals(Object o) {
    if (this == o) return true;
    if (o == null || getClass() != o.getClass()) return false;
    TwoKeysFMap<?, ?> map = (TwoKeysFMap<?, ?>)o;
    return myKey1.equals(map.myKey1) && myKey2.equals(map.myKey2) &&
           myValue1.equals(map.myValue1) && myValue2.equals(map.myValue2) ||
           myKey1.equals(map.myKey2) && myKey2.equals(map.myKey1) &&
           myValue1.equals(map.myValue2) && myValue2.equals(map.myValue1);
  }
@Override
  public boolean equals(Object o)