code: def _raw_next(self):
      record = variants_pb2.Variant()
      not_done = self._cc_iterable.PythonNext(record)
      return record, not_done
  
imports: from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  import abc
  import six
  from third_party.nucleus.protos import bed_pb2
  from third_party.nucleus.protos import bedgraph_pb2
  from third_party.nucleus.protos import fastq_pb2
  from third_party.nucleus.protos import gff_pb2
  from third_party.nucleus.protos import reads_pb2
  from third_party.nucleus.protos import variants_pb2
label_desc: Use image node_id 1 for calling the WrappedVariantIterable obj's underlying member method code with example usage: obj._raw_next() and returns: record,  not_done