class_docstr: Container for the repeated units in an Architecture.
class_docstr_tok: ["Container","for","the","repeated","units","in","an","Architecture","."]
code: def combiner(self):
      return COMBINER_MAP[self.combiner_type]
  
imports: import abc
  import collections
  import enum
  import time
  from absl import logging
  from model_search import block_builder
  from model_search import utils
  from model_search.architecture import architecture_utils
  from model_search.proto import phoenix_spec_pb2
  import tensorflow.compat.v2
label_desc: Use image node_id 3 for calling the Node obj's underlying member method code with example usage: obj.combiner() and returns: COMBINER_MAP