@Override
        public <S,T> DynamoDBTypeConverter<S,T> getConverter(Class<S> sourceType, Class<T> targetType) {
            DynamoDBTypeConverter<S,T> converter = overrides.<S,T>get(sourceType, targetType);
            if (converter == null) {
                converter = super.<S,T>getConverter(sourceType, targetType);
            }
            return converter;
        }
Delegate factory to allow selected types to be overriden.
aws-java-sdk-dynamodb/src/main/java/com/amazonaws/services/dynamodbv2/datamodeling/DynamoDBTypeConverterFactory.java