Function open_store 

pub async fn open_store<S: Vfs>(
    files: &StudioFiles<S>,
    path: &str,
) -> (VfsResult<FileNode>, Option<String>)

What the Studio asks of its files when it opens: the whole file tree (the examples from the site, the reader’s own files from the store) and the text of path, the file it opened with, or None when there is no such file. It writes nothing.