LSGetObjectForGlobalIDs.m:
- reduce usage of " IN " SQL qualifier if possible (ie, use "=" if there is
  only one ID to select)
- split up the huge _fetchAttributesInContext:gids: method
- document fetchAdditionalInfosForObjects:context:

LSArrayFilterCommand:
LSDBArrayFilterCommand:
LSDBTransaction:
LSDBObjectTransactionCommand:
- check whether these are actually used anywhere ..

LSMail:
- check whether this is actually used anywhere ..
- is yes, it might be better to replace it with something else?