LPS-38527 Extending framework with import helper methods
LPS-38527 Adding default implementation - throwing exception so developers will notice early if a global entity is being referenced and they have to implement the method - abstract is not an option since it's not obligatory for every SMDH
LPS-38527 Apply to those are not simple - implementing new global scope processing method then simplify and refactor
LPS-38527 Apply to the easy ones - use generic method everywhere where needed
LPS-38527 Apply to display style portlets
LPS-38527 Only dependency and weak gets validated - change global items to explicit dependency
LPS-38527 Implement missing validation code pieces
LPS-38527 change to use UnsupportedOperationException
LPS-38527 rename to importGlobalStagedModel