SQS: getAttributeValue does not account for attributes potentially being null (#3852)

Author: danielmarbach

generator/.DevConfigs/6f8877b7-a2dc-410f-ad81-35aa3a0dddf9.json

@@ -0,0 +1,11 @@
+{
+    "services": [
+        {
+            "serviceName": "SQS",
+            "type": "patch",
+            "changeLogMessages": [
+                "Fix `GetQueueAttributesResponse` to handle attributes potentially being null (https://github.com/aws/aws-sdk-net/pull/3852)"
+            ]
+        }
+    ]
+}

sdk/src/Services/SQS/Custom/Model/GetQueueAttributesResponse.extensions.cs

@@ -207,7 +207,7 @@ public bool? ContentBasedDeduplication
         private string getAttributeValue(string field)
         {
             string value = null;
-            this.Attributes.TryGetValue(field, out value);
+            this.Attributes?.TryGetValue(field, out value);
             return value;
         }
     }