The following is a stereotype extending two metaclasses (uml::Class and uml::Operation):
profile my_profile; import uml; stereotype foo extends Class, Operation required end; end.
In the example above, the extension of Operation is required, the extension of Class is not.
Here are the individual changes per plug-in (r153-r156):
Any other UML feature you would like to see exposed in the TextUML notation? Suggestions are welcome.