class_docstr: Class for reading from unindexed FASTA files.
code: def __exit__(self, exit_type, exit_value, exit_traceback):
      self._reader.__exit__(exit_type, exit_value, exit_traceback)
  
imports: from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  import collections
  import six
  from etils import epath
  from third_party.nucleus.io import genomics_reader
  from third_party.nucleus.io.python import reference
  from third_party.nucleus.protos import fasta_pb2
  from third_party.nucleus.protos import reference_pb2
  from third_party.nucleus.util import ranges
label_desc: Use image node_id 7 for calling the UnindexedFastaReader obj's underlying member method code with example usage: obj.__exit__(exit_type, exit_value, exit_traceback) without return types