class_docstr: Mock explainer that allows testing most of the functionality in alibi.utils.distributed. 
code: def __init__(self, sleep_time: int, multiplier: int = 3):
      self.sleep_time = sleep_time
      self.multiplier = multiplier
      self.proc_id: Optional[int] = None
  
imports: import inspect
  import os
  import pytest
  import time
  from itertools import product
  from typing import Any, Dict, List, Optional, Tuple, Union
  import numpy
  from alibi.utils.distributed import DistributedExplainer, PoolCollection, ResourceError, invert_permutation, concatenate_minibatches
label_desc: Use image node_id 1 to create a new MockExplainer object  with example: obj = MockExplainer(sleep_time, multiplier)