def getSourceContainer(self):
        sourceComponent = self.getSourceComponent()
        if isinstance(sourceComponent, IViewer):
            return sourceComponent.getContainerDataSource()
        else:
            # this should not happen
            return None
The sub file entries (generator of instance of vfs.SQLiteBlobFileEntry).
dataset/ETHPy150Open rwl/muntjac/muntjac/event/data_bound_transferable.py/DataBoundTransferable.getSourceContainer--crossover with--dataset/ETHPy150Open log2timeline/dfvfs/dfvfs/vfs/sqlite_blob_file_entry.py/SQLiteBlobFileEntry.sub_file_entries