expose helper method to retrieve oneOf isntance (#1284)

Author: skarimo

.generator/src/generator/templates/model_utils.j2

@@ -554,6 +554,10 @@ class ModelComposed(OpenApiModel):
         """Returns the string representation of the model"""
         return pprint.pformat(self.to_dict())
 
+    def get_oneof_instance(self):
+        """Returns the oneOf instance"""
+        return self._composed_instances[0]
+
     def __eq__(self, other):
         """Returns true if both objects are equal"""
         if not isinstance(other, self.__class__):

src/datadog_api_client/model_utils.py

@@ -557,6 +557,10 @@ def to_str(self):
         """Returns the string representation of the model"""
         return pprint.pformat(self.to_dict())
 
+    def get_oneof_instance(self):
+        """Returns the oneOf instance"""
+        return self._composed_instances[0]
+
     def __eq__(self, other):
         """Returns true if both objects are equal"""
         if not isinstance(other, self.__class__):