code: public PaginatedScanList<T> scan(DynamoDBScanExpression scanExpression) {
          return mapper.<T>scan(model.targetType(), scanExpression);
      }
docs: Scans through an Amazon DynamoDB table and returns the matching results
  as an unmodifiable list of instantiated objects.
  @param scanExpression The scan expression.
  @return The scan results.
  @see com.amazonaws.services.dynamodbv2.datamodeling.DynamoDBMapper#scan