Add warning for grouping flash files

Author: kg583

pyproject.toml

@@ -55,7 +55,7 @@ privacy = ["PRIVATE:**.__class_getitem__", "PRIVATE:**.__get__", "PRIVATE:**.__i
            "PRIVATE:tivars.models.model.*",
            "PUBLIC:tivars.models.model.TIFeature", "PUBLIC:tivars.models.model.TIModel",
 
-           "PRIVATE:tivars.cli.parser.*",
+           "HIDDEN:tivars.cli.parser.*",
 
            "PRIVATE:tivars.__version__",
 ]

tivars/types/group.py

@@ -53,6 +53,9 @@ def group(entries: Sequence[TIEntry], *, name: str = "GROUP") -> 'TIGroup':
                  UserWarning)
 
         for index, entry in enumerate(entries):
+            if not isinstance(entry, TIEntry):
+                raise TypeError(f"groups cannot hold '{entry.__class__}' types")
+
             name = entry.raw.name.rstrip(b'\x00')
             vat = bytearray([entry.type_id, 0, entry.version, 0, 0, entry.archived])