@Override
  public boolean equals(Object o) {
    if (this == o) return true;
    if (o == null || getClass() != o.getClass()) return false;

    TextChangeImpl that = (TextChangeImpl)o;
    return myStart == that.myStart && myEnd == that.myEnd && StringUtil.equals(myText, that.myText);
  }
@Override
  public boolean equals(Object o)