def _seek(rgc, genome_name, asset_name, tag_name=None,
          seek_key=None, enclosing_dir=False):
    """
    Strict seek. Most use cases in this package require file existence
     check in seek. This function makes it easier
    """
    return rgc.seek(genome_name=genome_name,
                    asset_name=asset_name,
                    tag_name=tag_name,
                    seek_key=seek_key,
                    enclosing_dir=enclosing_dir,
                    strict_exists=True)