By default if you are using 'Model' block to refer to child model then during code-generation two separate files are created for 'parent' and 'child' because they are two different models, and parent model just refers the child model.
However, a possible workaround is to make child model a part of parent model using 'Subsystem' block.
- You can try using 'Subsystem' block instead of 'Model reference'.
- Copy the entire child model and paste it inside the 'Subsytem' block.
- Generate the code for the new model.
Hope it helps!
