I am a bit desperate. I want to add a checkbox like in the sample "notesOrganizer" to my project. So create a checkbox like [ ] for false and [x] for true. In the sample you have the option to insert a checkbox in your editor with the command "checkbox". But when I try this in my project, I can not find it. I compared the dependencies in the model properties of the language and I did not find any differences. Can someone help me, please?