Still to do:

• write documentation
• consider merging / simplifying the contrats to interact with the source (IdExtractor, ObjectInitializer, EntitySourceContext, maybe more)
• add support for hierarchical entities - not the main use case so not super important I suppose
• add more feature tests in particular in multi-entities, explore what happens if hierarchy actually are involved etc)
• add a test involving a more complex datasource than a hash map ?
• discuss and solve the question on add/update/delete vs index/purge
• massindexer (probably not necessary)
• consider using JPA names
• IdExtractor vs explicit id param in WorkLoad methods
• JMX?