code: def setup_method(self):
      super().setup_method()
      self.token_indexers = {"tokens": SingleIdTokenIndexer()}
      self.vocab = Vocabulary()
      self.this_index = self.vocab.add_token_to_namespace("this")
      self.is_index = self.vocab.add_token_to_namespace("is")
      self.a_index = self.vocab.add_token_to_namespace("a")
      self.sentence_index = self.vocab.add_token_to_namespace(
          "sentence"
      )
      self.another_index = self.vocab.add_token_to_namespace("another")
      self.yet_index = self.vocab.add_token_to_namespace("yet")
      self.very_index = self.vocab.add_token_to_namespace("very")
      self.long_index = self.vocab.add_token_to_namespace("long")
      instances = [
          self.create_instance(["this", "is", "a", "sentence"]),
          self.create_instance(["this", "is", "another", "sentence"]),
          self.create_instance(["yet", "another", "sentence"]),
          self.create_instance(
              [
                  "this",
                  "is",
                  "a",
                  "very",
                  "very",
                  "very",
                  "very",
                  "long",
                  "sentence",
              ]
          ),
          self.create_instance(["sentence"]),
      ]
  
      self.instances = instances
      self.lazy_instances = LazyIterable(instances)
  
file_path: allennlp/tests/data/samplers/sampler_test.py
imports: from typing import List, Iterable, Dict, Union
  from allennlp.common.testing import AllenNlpTestCase
  from allennlp.data import Vocabulary, Instance, Token, Batch, DatasetReader
  from allennlp.data.fields import TextField
  from allennlp.data.token_indexers import SingleIdTokenIndexer
label_desc: Use image node_id 1 for calling the SamplerTest obj's underlying member method code with example usage: obj.setup_method() without return types