code: def as_tuple(range_):
      """Returns a Python tuple (reference_name, start, end)."""
      return range_.reference_name, range_.start, range_.end
  
imports: from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  import collections
  import re
  from typing import Dict, Iterable, Optional, Sequence
  from absl import logging
  from etils import epath
  import intervaltree
  import six
  from third_party.nucleus.io import bed
  from third_party.nucleus.protos import position_pb2
  from third_party.nucleus.protos import range_pb2
  from third_party.nucleus.protos import reference_pb2
  from third_party.nucleus.protos import variants_pb2
label_desc: Use image node_id 15 for calling a global function with example usage: as_tuple(range_) and returns: range_,  range_,  range_