code: def setUp(self) -> None:
      self.world_size = 64
      self.batch_size = 256
  
file_path: torchrec/torchrec/metrics/tests/test_throughput.py
imports: import unittest
  from unittest.mock import Mock, patch
  from torchrec.metrics.throughput import ThroughputMetric
label_desc: Use image node_id 1 for calling the ThroughputMetricTest obj's underlying member method code with example usage: obj.setUp() without return types