get_nodes_in_path
Description:
[ Version ( since = "4.2" ) ]
public SList<unowned TreeNode> get_nodes_in_path (string? tree_path, bool use_names)
  public SList<unowned TreeNode> get_nodes_in_path (string? tree_path, bool use_names)
The returned list is a list of all the TreeNode nodes below the node at
      the specified path.
As a corner case if tree_path is null, then the returned list contains all the top level nodes.
Parameters:
| this | a Tree object | 
| tree_path | full path to the required nodes (if  | 
| use_names | if  | 
Returns:
| a new list of TreeNode pointers, free it with  |