code: def setUp(self) -> None:
      self.task = "abc"
  
imports: import re
  import unittest
  from torchrec.metrics.metrics_namespace import compose_metric_key, MetricName, MetricNamespace, MetricPrefix, task_wildcard_metrics_pattern
label_desc: Use image node_id 1 for calling the MetricNamespaceTest obj's underlying member method code with example usage: obj.setUp() without return types