class_docstr: The LAMBADA task using the LAMBADA OpenAI dataset, a modified version of the
  original LAMBADA dataset created by OpenAI for evaluating their GPT-2 model.
  
  Reference: https://github.com/openai/gpt-2/issues/131#issuecomment-497136199
code: def has_test_docs(self):
      return True
  
imports: from lm_eval.base import Task, rf
  from lm_eval.metrics import mean, perplexity
label_desc: Use image node_id 3 for calling the LambadaOpenAI obj's underlying member method code with example usage: obj.has_test_docs() and returns: True