Add group parameter feature

aiohttp_pydantic/utils.py

@@ -5,7 +5,15 @@ def is_pydantic_base_model(obj):
     """
     Return true is obj is a pydantic.BaseModel subclass.
     """
+    return robuste_issubclass(obj, BaseModel)
+
+
+def robuste_issubclass(cls1, cls2):
+    """
+    function likes issubclass but returns False instead of raise type error
+    if first parameter is not a class.
+    """
     try:
-        return issubclass(obj, BaseModel)
+        return issubclass(cls1, cls2)
     except TypeError:
         return False