The abstract class DataStoreTestBase contains 2 deprecated methods:
DataStore<String, Employee> createEmployeeDataStore()
DataStore<String, WebPage> createWebPageDataStore()
These methods were useful in the past but they seem not to be useful now.
I believe that they should be removed from the abstract class DataStoreTestBase. Their concrete implementations from the subclasses that extend the DataStoreTestBase should also be removed.