/// <summary>
        /// Unmarshaller the response from the service to the response class.
        /// </summary>  
        /// <param name="context"></param>
        /// <returns></returns>
        public override AmazonWebServiceResponse Unmarshall(XmlUnmarshallerContext context)
        {
            ModifyDBInstanceResponse response = new ModifyDBInstanceResponse();

            context.Read();
            int targetDepth = context.CurrentDepth;
            while (context.ReadAtDepth(targetDepth))
            {
                if (context.IsStartElement)
                {                    
                    if(context.TestExpression("ModifyDBInstanceResult", 2))
                    {
                        UnmarshallResult(context, response);                        
                        continue;
                    }
                    
                    if (context.TestExpression("ResponseMetadata", 2))
                    {
                        response.ResponseMetadata = ResponseMetadataUnmarshaller.Instance.Unmarshall(context);
                    }
                }
            }

            return response;
        }
        private static void UnmarshallResult(XmlUnmarshallerContext context, ModifyDBInstanceResponse response)
        {
            
            int originalDepth = context.CurrentDepth;
            int targetDepth = originalDepth + 1;
            
            if (context.IsStartOfDocument) 
               targetDepth += 2;
            
            while (context.ReadAtDepth(originalDepth))
            {
                if (context.IsStartElement || context.IsAttribute)
                {

                    if (context.TestExpression("DBInstance", targetDepth))
                    {
                        var unmarshaller = DBInstanceUnmarshaller.Instance;
                        response.DBInstance = unmarshaller.Unmarshall(context);
                        continue;
                    }
                } 
           }

            return;
        }
 private static void UnmarshallResult(XmlUnmarshallerContext context,ModifyDBInstanceResponse response)
 {
     int originalDepth = context.CurrentDepth;
     int targetDepth = originalDepth + 1;
     if (context.IsStartOfDocument) 
        targetDepth += 2;
     
     while (context.Read())
     {
         if (context.IsStartElement || context.IsAttribute)
         {
             if (context.TestExpression("DBInstance", targetDepth))
             {
                 response.DBInstance = DBInstanceUnmarshaller.GetInstance().Unmarshall(context);
                 continue;
             }
         }
         else if (context.IsEndElement && context.CurrentDepth < originalDepth)
         {
             return;
         }
     }
 }
        public override AmazonWebServiceResponse Unmarshall(XmlUnmarshallerContext context)
        {
            ModifyDBInstanceResponse response = new ModifyDBInstanceResponse();

            while (context.Read())
            {
                if (context.IsStartElement)
                {

                    if(context.TestExpression("ModifyDBInstanceResult", 2))
                    {
                        response.ModifyDBInstanceResult = ModifyDBInstanceResultUnmarshaller.GetInstance().Unmarshall(context);
                        continue;
                    }

                    if (context.TestExpression("ResponseMetadata", 2))
                    {
                        response.ResponseMetadata = ResponseMetadataUnmarshaller.GetInstance().Unmarshall(context);
                    }
                }
            }

            return response;
        }