Demonstrate how to use apply_parameters (#562)

Author: laurachevalier4

examples/recommendations/apply_recommendation.py

@@ -36,6 +36,11 @@ def main(client, customer_id, recommendation_id):
     apply_recommendation_operation.resource_name = recommendation_service.recommendation_path(
         customer_id, recommendation_id
     )
+    
+    # This is where we override the recommended ad when a TextAdRecommendation is applied.
+    # override_ad = client.get_type("Ad")
+    # override_ad.resource_name = "INSERT_AD_ID_HERE"
+    # apply_recommendation_operation.text_ad.ad = override_ad
 
     recommendation_response = recommendation_service.apply_recommendation(
         customer_id=customer_id, operations=[apply_recommendation_operation]