code: def test_get_distributions(self) -> None:
      distr = self.aggregator.get_distributions()
      self.assertEqual(len(distr), 3)
      self.assertEqual(distr["A"], [0.3, 0.4])
      self.assertEqual(distr["B"], [0.3, 0.4])
      self.assertEqual(distr["C"], [0.4, 0.2])
  
file_path: ReAgent/reagent/test/core/aggregators_test.py
imports: import unittest
  import torch
  from reagent.core.aggregators import ActionCountAggregator
label_desc: Use image node_id 2 for calling the ActionCountAggregatorTest obj's underlying member method code with example usage: obj.test_get_distributions() without return types