fixed healing GraphQLUnionType
@@ -543,7 +543,7 @@ def heal_schema(schema: GraphQLSchema) -> GraphQLSchema:
pass
elif isinstance(type_, GraphQLUnionType):
- update_each_key(type_.types, heal_type)
+ each(type_.types, heal_type)
elif isinstance(type_, GraphQLEnumType):
# Nothing to do.
