| BaseFolder | Abstract base class for folders. It handles the available fields and getters / setters. |
| Creatable | Abstract class for a creatable folder item. It handles all general actions for a folder item. If you want to add an new folder type, have a look at the api function wp_rml_register_creatable(); |
| CRUD | Static class to perform CRUD operations on folders. Please do not use this directly instead use the API functions. |
| Folder | This class creates a folder object. (Type 0) See parent classes / interfaces for better documentation. |
| QueryCount | Get the count of WP_Query resultset instead of all the rows. |
| Root | This class creates a root object. (Type 4) See parent classes / interfaces for better documentation. |