@NotNull
  private static String getGroupAndArtifactId(CheckedTreeNode node) {
    Artifact artifact = ((ArtifactDependencyNode)node.getUserObject()).getArtifact();
    return artifact.getGroupId() + ":" + artifact.getArtifactId();
  }
@NotNull
  private static String getGroupAndArtifactId(CheckedTreeNode node)