Please note that all classes derived from the abstract class __D_swimlane__ must be included in a MODE. Although all other classes and relation classes are displayed even if no MODE is defined, you must define at least one mode if you want to use a class derived from the __D_swimlane__.
The piece of code below exemplifies the definition of a standard mode for the model type "Sample" (class Swimplane_Vertical has been derived from class __D_swimlane__):

The current version of ADOxx does not allow customizable grouping of objects in the Modelling toolbar. There is the predefined grouping of modelling items into classes, relation classes and classes derived from the abstract class __D_swimlane__ .

An alternative would be defining subgroups of classes of your modeltype usind the element MODE in the library attribute Modi. A description of how to use the MODE element can be found in the following thread:  http://www.adoxx.org/live/faq/-/message_boards/view_message/20030#_19_message_20017