class_docstr: Base class for Diet variable optimizers.
code: def create_slots(self, var):
      raise NotImplementedError()
  
imports: from collections import defaultdict
  import copy
  import math
  from tensor2tensor.layers import common_layers
  from tensor2tensor.utils import hparam
  import tensorflow.compat.v1
label_desc: Use image node_id 4 for calling the DietVariableOptimizer obj's underlying member method code with example usage: obj.create_slots(var) without return types