model: add new type `MNotNullType` to force that null is excluded from a type.
[nit.git] / tests / project1 /
drwxr-xr-x   ..
-rw-r--r-- 35 module1.nit
-rw-r--r-- 43 module2.nit
-rw-r--r-- 42 project1.nit