@Override
  public boolean equals(Object o) {
    if (this == o) return true;
    if (o == null || getClass() != o.getClass()) return false;
    VcsLogRevisionFilterImpl filter = (VcsLogRevisionFilterImpl)o;
    return Comparing.haveEqualElements(getHeads(), filter.getHeads());
  }
@Override
  public boolean equals(Object o)