class_docstr: Holds an indirect reference to a (shared) metrics context.
  
  This is used by LocalIterator.union() to point the metrics contexts of
  entirely separate iterator chains to the same underlying context.
code: def get(self):
      return self.metrics
  
file_path: ray/python/ray/util/iter_metrics.py
imports: import collections
  from typing import List
  from ray.util.annotations import Deprecated
  from ray.util.timer import _Timer
label_desc: Use image node_id 3 for calling the SharedMetrics obj's underlying member method code with example usage: obj.get() and returns: self