class_docstr: Allows us to get bases from a cached reference interval.
class_docstr_tok: ["Allows","us","to","get","bases","from","a","cached","reference","interval","."]
code: def bases(self, start, end):
      return self.query(
          ranges.make_range(self._PLACEHOLDER_CHROM_NAME, start, end)
      )
  
imports: import collections
  import copy
  import enum
  import heapq
  import itertools
  from absl import logging
  from deepvariant.labeler import variant_labeler
  from deepvariant.protos import deepvariant_pb2
  from third_party.nucleus.io import fasta
  from third_party.nucleus.util import ranges
  from third_party.nucleus.util import variant_utils
  from third_party.nucleus.util import variantcall_utils
label_desc: Use image node_id 2 for calling the ReferenceRegion obj's underlying member method code with example usage: obj.bases(start, end) and returns: self