docs: def get_item_abspath(self, identifier):
          """Return absolute path at which item content can be accessed.
  
          :param identifier: item identifier
          :returns: absolute path from which the item content can be accessed
          """
          admin_metadata = self.get_admin_metadata()
          uuid = admin_metadata["uuid"]
          # Create directory for the specific dataset.
          dataset_cache_abspath = os.path.join(self._irods_cache_abspath, uuid)
          mkdir_parents(dataset_cache_abspath)
  
          # Get the file extension from the  relpath from the handle metadata.
          irods_item_path = os.path.join(self._data_abspath, identifier)
          relpath = self._get_metadata_with_cache(irods_item_path, "handle")
          _, ext = os.path.splitext(relpath)
  
          local_item_abspath = os.path.join(
              dataset_cache_abspath,
              identifier + ext)
  
          if not os.path.isfile(local_item_abspath):
              tmp_local_item_abspath = local_item_abspath + ".tmp"
              _get_file_forcefully(irods_item_path, tmp_local_item_abspath)
              os.rename(tmp_local_item_abspath, local_item_abspath)
  
          return local_item_abspath