How to get the status of a directory node?

[Kaiser-Yang]

I want to check if the directory is opened or collapse? Something like this:

        local node = api.tree.get_node_under_cursor()
        if node == nil then
            return
        end
        if vim.fn.isdirectory(node.absolute_path) == 1 then
            if node is not opened then
                api.node.navigate.parent(node)
            else
                api.node.open.edit(node)
            end
        end

How do I implement this?

[Kaiser-Yang]

Just use node.open.