— Function: apptree::nodetype_exist NODETYPE

Return 1 if there is already a node type called NODETYPE on the current tree.

— Function: apptree::register_nodetype ID

Register ID as a new nodetype supported by the tree.

The defaults for nodetypes are:

• The image is 'default_icon'
• The text prefix is empty: {}
• The parent nodetype is 'root_type'
• The preferred order is 'last'
• There is not a primary action: {}
• There is not a secondary action: {}
• The context menu is empty: {}

— Function: apptree::unregister_nodetype ID

Removes the registration of the nodetype ID.