title: Fetching All Items with DynamoDBMapper
body: <p>I want to get all of the records from a Dynamo DB table and have them mapped into an array of POJOs; The POJO is simple and already annotated. </p>
  
  <p>DynamoDBMapper appears to be the object that will do a fetch to acquire the records and deserialize them into my POJOs. Perhaps using PaginatedScanList() to walk through the entire table.</p>
  
  <p>Mapper's Scan() and PaginatedScanList() methods both require a DynamoDBScanExpression parameter. What DynamoDBScanExpression would be used to select all of the records in the table?</p>