@Override
    public boolean equals(Object o) {
      if (this == o) {
        return true;
      }
      if (o == null || getClass() != o.getClass()) {
        return false;
      }
      ArtifactVerification that = (ArtifactVerification)o;
      return Objects.equals(url, that.url) && Objects.equals(sha256sum, that.sha256sum);
    }
@Override
    public boolean equals(Object o)