@Override
  public boolean equals(Object obj) {
    if (obj == this) return true;
    if (!(obj instanceof KeyFMap)) return false;
    KeyFMap other = (KeyFMap)obj;
    if (this.size() != other.size()) return false;
    return myMap.entrySet().stream().allMatch(entry -> Objects.equals(entry.getValue(),other.get(entry.getKey())));
  }
@Override
  public boolean equals(Object obj)