registry.Regexp: Better safeguard against misuses of _setValue()

src/registry.py

@@ -802,16 +802,14 @@ class Regexp(Value):
         else:
             super().set(v)
 
-    def setValue(self, v):
-        """Don't call this function directly from plugins, it is subject
-        to change without notice."""
+    def _setValue(self, v, *args, **kwargs):
         if v is not None and (not isinstance(v, tuple) or len(v) != 2):
             raise InvalidRegistryValue(
                 'Can\'t setValue a regexp, there would be an inconsistency '
                 'between the regexp and the recorded string value. '
                 'Use .set() instead.')
 
-        super().setValue(v)
+        super()._setValue(v, *args, **kwargs)
 
     def __call__(self):
         value = super().__call__()