file status information
| std_types::object | the prototype object for all "normal" objects |
| std::access_time_of | returns the access time of the specified file |
| std::is_a_directory | returns true if the file is a directory |
| std::modification_time_of | returns the modification time of the specified file |
| std::status_change_time_of | returns the status change time of the specified file |