class_docstr: BaseClass for variant callers.
class_docstr_tok: ["BaseClass","for","variant","callers","."]
code: def get_candidate_positions(
      self,
      allele_counters: Dict[str, allelecounter.AlleleCounter],
      sample_name: str,
  ):
      raise NotImplementedError
  
imports: import abc
  import collections
  import itertools
  import math
  import operator
  import statistics
  from typing import Dict, Sequence, Tuple
  import numpy
  from deepvariant.protos import deepvariant_pb2
  from deepvariant.python import allelecounter
  from deepvariant.python import variant_calling
  from deepvariant.python import variant_calling_multisample
  from third_party.nucleus.protos import variants_pb2
  from third_party.nucleus.util import genomics_math
  from third_party.nucleus.util import variantcall_utils
  from third_party.nucleus.util import vcf_constants
label_desc: Use image node_id 7 for calling the VariantCaller obj's underlying member method code with example usage: obj.get_candidate_positions(allele_counters, sample_name) without return types