code: def test_dynchunktrain():
      from speechbrain.utils.dynamic_chunk_training import (
          DynChunkTrainConfig,
      )
  
      assert DynChunkTrainConfig(
          chunk_size=16
      ).is_infinite_left_context()
      assert not DynChunkTrainConfig(
          chunk_size=16, left_context_size=4
      ).is_infinite_left_context()
  
label_desc: Use image node_id 2 for calling a global function with example usage: test_dynchunktrain() without return types