LPS-32783 Extending StagedModelDataHandler interface to support more entities from the same kind
LPS-32783 Apply changes from previous commit to all SMDHs
LPS-32783 Fine tuning the way we find elements in the portlet-data.xml
LPS-32783 Avoiding possible NPEs
LPS-32783 New method for ExportImportPathUtil
LPS-32783 Creating new SMDHs and copy/paste the relevant methods from DLPortletDataHandler. Also cleaning DLPortletDataHandler up
LPS-32783 Registering new StagedModelDataHandlers in liferay-portlet.xml
LPS-32783 Apply changes to SMDHs to fit to the new environment
LPS-32783 Apply changes to the portlet data handlers
LPS-32783 Apply changes to portlets referencing document library
LPS-32783 Fix LiferayFileEntry clone method for NPE
LPS-32783 source formatting - reuse existing method
LPS-32783 SF, copy from AtomCollectionAdapterRegistryImpl
LPS-32783  Remove unnecessary cast
LPS-32783 SF, copy from AtomCollectionAdapterRegistryImpl
LPS-32783 Fix major bug where you're importing entityElement many times, and skipping dlRepositoryElement, dlFileEntryElement, and dlFileRankElement!
LPS-32783 SF
LPS-32783 Update JavaDoc links that were forgotten as part of the refactor of DLPortletDataHandler
LPS-32783 Follow pattern from MDRRuleGroupInstanceStagedModelDataHandler
LPS-34506 - Write validation tests for contains / equals / isset