def __init__( self, app ): self.type_registry = DatasetCollectionTypesRegistry( app ) self.collection_type_descriptions = CollectionTypeDescriptionFactory( self.type_registry ) self.model = app.model self.security = app.security self.hda_manager = hdas.HDAManager() self.history_manager = histories.HistoryManager() self.tag_manager = tags.TagsManager( app ) self.ldda_manager = lddas.LDDAManager( )