Expand non psi-based ProjectViewTree nodes

Why `com.intellij.ide.projectView.impl.AbstractProjectViewPSIPane#select` is not good?

Because these nodes are just children of ProjectViewNode<String>, they do not have VirtualFile to select.
The node whose children I want to expand looks like this:

public class MyRootNode extends ProjectViewProjectNode {

    public MyRootNode(Project project, ViewSettings viewSettings) {
        //constructor
    }

    @NotNull
    @Override
    public Collection<AbstractTreeNode> getChildren() {
        return Arrays.asList(new SomeSection(myProject, getSettings()),
                new SomeSection(myProject, getSettings()));
    }
}

class SomeSection extends ProjectViewNode<String> {}

ProjectView was designed to work with PsiElements or VirtualFiles.

In your case you could use the following method to expand top nodes:
```com.intellij.util.ui.tree.TreeUtil#promiseExpand(javax.swing.JTree, int)```
where depth level should be set to 2.

I hope your SomeSection class implements contains(VirtualFile) method correctly to support searching of containing files.

What are these nodes, if it's not a secret?

Thanks, TreeUtil#promiseExpand works for me.

Yes, my custom nodes implements contains(VirtualFile) method.

For example

This node aggregate all gradle scripts from the project