public ExpandingFileSystemNodeFactory(
     FileSystemNodeFactory inner_factory,
     ExpandingNodeCommandFactory expanding_node_command_factory, TreeView tree)
 {
     this.inner_factory = inner_factory;
     this.tree = tree;
     this.expanding_node_command_factory = expanding_node_command_factory;
 }
 public PopulateNodeWithDirectoriesCommand(TreeNode node,
         FileSystemNodeFactory node_factory,
                                           FileSystem file_system,
                                           string path)
 {
     this.node = node;
     this.node_factory = node_factory;
     this.file_system = file_system;
     this.path = path;
 }