@Nullable
    private DependencyExternalSystemNode findReferencedNode(ExternalSystemNode<?> node) {
      for (ExternalSystemNode<?> child : node.getChildren()) {
        if (child instanceof DependencyExternalSystemNode &&
            ((DependencyExternalSystemNode)child).myDependencyNode == myReferencedNode) {
          return (DependencyExternalSystemNode)child;
        }
        DependencyExternalSystemNode referencedNode = findReferencedNode(child);
        if (referencedNode != null) return referencedNode;
      }
      return null;
    }
@Nullable
    private DependencyExternalSystemNode findReferencedNode(ExternalSystemNode<?> node)