code: def create_estimator(self, instance_count=1):
      # creates estimator
      return HuggingFace(
          entry_point=self.script,
          source_dir=self.env.test_path,
          role=self.env.role,
          image_uri=self.env.image_uri,
          base_job_name=f"{self.env.base_job_name}-single",
          instance_count=instance_count,
          instance_type=self.instance_type,
          debugger_hook_config=False,
          hyperparameters={
              **self.env.hyperparameters,
              "model_name_or_path": self.model_name_or_path,
          },
          metric_definitions=self.env.metric_definitions,
          py_version="py36",
      )
  
file_path: transformers/tests/sagemaker/test_single_node_gpu.py
imports: import json
  import os
  import subprocess
  import unittest
  from ast import literal_eval
  import pytest
  from parameterized import parameterized_class
  from .None import is_sagemaker_available
label_desc: Use image node_id 2 for calling the SingleNodeTest obj's underlying member method code with example usage: obj.create_estimator(instance_count) and returns: HuggingFace