@Override
    public boolean equals(Object o) {
      if (this == o) return true;
      if (o == null || getClass() != o.getClass()) return false;
      CauseItem item = (CauseItem)o;
      return myChildren.equals(item.myChildren) &&
             getProblemName().equals(item.getProblemName()) &&
             Objects.equals(myTarget, item.myTarget);
    }
@Override
    public boolean equals(Object o)