docstr: Get estimated memory for tag lookup, 0 if using pure int tags.
  
  Returns
  -------
  int
      The estimated RAM required to look up a tag in bytes.
code: def estimated_lookup_memory(self):
      """Get estimated memory for tag lookup, 0 if using pure int tags.
  
      Returns
      -------
      int
          The estimated RAM required to look up a tag in bytes.
  
      """
      return 60 * len(self.dv) + 140 * len(self.dv)
  
imports: import logging
  import os
  from collections import namedtuple, defaultdict
  from collections.abc import Iterable
  from timeit import default_timer
  from dataclasses import dataclass
  from numpy import zeros, float32, vstack, integer, dtype
  import numpy
  from gensim import utils, matutils
  from gensim.utils import deprecated
  from gensim.models import Word2Vec, FAST_VERSION
  from gensim.models.keyedvectors import KeyedVectors, pseudorandom_weak_vector
label_desc: Use image node_id 14 for calling the Doc2Vec obj's underlying member method code with example usage: obj.estimated_lookup_memory() and returns: unknown