class_docstr: Mock class to replicate the context passed into model initialize
code: def get_request_header(self, idx, exp):
      if idx and exp:
          if self.explain:
              return True
      return False
  
file_path: serve/ts/torch_handler/unit_tests/test_utils/mock_context.py
imports: import os
  import uuid
  import torch
  from ts.metrics.metrics_store import MetricsStore
  from ts.utils.util import get_yaml_config
label_desc: Use image node_id 2 for calling the MockContext obj's underlying member method code with example usage: obj.get_request_header(idx, exp) and returns: False, True