feat: Add enableEnhancedCivicAnswers feature in GenerateContentConfig

PiperOrigin-RevId: 841973502

Author: jaycee-li

Google.GenAI/Batches.cs

@@ -1053,6 +1053,13 @@ internal JsonNode GenerateContentConfigToMldev(ApiClient apiClient, JsonNode fro
                                toObject));
       }
 
+      if (Common.GetValueByPath(fromObject, new string[] { "enableEnhancedCivicAnswers" }) !=
+          null) {
+        Common.SetValueByPath(
+            toObject, new string[] { "enableEnhancedCivicAnswers" },
+            Common.GetValueByPath(fromObject, new string[] { "enableEnhancedCivicAnswers" }));
+      }
+
       return toObject;
     }
 

Google.GenAI/Models.cs

@@ -1095,6 +1095,13 @@ internal JsonNode GenerateContentConfigToMldev(ApiClient apiClient, JsonNode fro
                                toObject));
       }
 
+      if (Common.GetValueByPath(fromObject, new string[] { "enableEnhancedCivicAnswers" }) !=
+          null) {
+        Common.SetValueByPath(
+            toObject, new string[] { "enableEnhancedCivicAnswers" },
+            Common.GetValueByPath(fromObject, new string[] { "enableEnhancedCivicAnswers" }));
+      }
+
       return toObject;
     }
 
@@ -1270,6 +1277,12 @@ internal JsonNode GenerateContentConfigToVertex(ApiClient apiClient, JsonNode fr
                                 toObject));
       }
 
+      if (!Common.IsZero(
+              Common.GetValueByPath(fromObject, new string[] { "enableEnhancedCivicAnswers" }))) {
+        throw new NotSupportedException(
+            "enableEnhancedCivicAnswers parameter is not supported in Vertex AI.");
+      }
+
       return toObject;
     }
 

Google.GenAI/types/GenerateContentConfig.cs

@@ -350,6 +350,17 @@ public ImageConfig
             get; set;
           }
 
+    /// <summary>
+    /// Enables enhanced civic answers. It may not be available for all models. This field is not
+    /// supported in Vertex AI.
+    /// </summary>
+    [JsonPropertyName("enableEnhancedCivicAnswers")]
+    [JsonIgnore(Condition = JsonIgnoreCondition.WhenWritingNull)]
+    public bool
+        ? EnableEnhancedCivicAnswers {
+            get; set;
+          }
+
     /// <summary>
     /// Deserializes a JSON string to a GenerateContentConfig object.
     /// </summary>