class_docstr: Make a list of strings from a provided string. A length of the resulting list equals a length
  of a provided reference argument.
docstr: Multiply each string in a provided batch of strings.
  
  Args:
      batch_s: a batch of strings to be multiplied
      ref: a reference to obtain a length of the resulting list
  
  Returns:
      a multiplied s as list
docstr_tok: ["Multiply","each","string","in","a","provided","batch","of","strings",".","Args",":","batch_s",":","a","batch","of","strings","to","be","multiplied","ref",":","a","reference","to","obtain","a","length","of","the","resulting","list","Returns",":","a","multiplied","s","as","list"]
code: def __call__(
      self, batch_s: List[str], ref: List[str]
  ) -> List[List[str]]:
      """Multiply each string in a provided batch of strings.
  
      Args:
          batch_s: a batch of strings to be multiplied
          ref: a reference to obtain a length of the resulting list
  
      Returns:
          a multiplied s as list
  
      """
      res = []
      for s, r in zip(batch_s, ref):
          res.append([s] * len(r))
  
      return res
  
file_path: DeepPavlov/deeppavlov/models/preprocessors/odqa_preprocessors.py
imports: from itertools import chain
  from logging import getLogger
  from typing import List, Callable, Union, Tuple, Optional
  from nltk import sent_tokenize
  from deeppavlov.core.common.registry import register
  from deeppavlov.core.models.component import Component
label_desc: Use image node_id 2 for calling the StringMultiplier obj's underlying member method code with example usage: obj.__call__(batch_s, ref) and returns: res