code: def testClearAllCollection(self):
      config = de_config_pb2.DynamicEmbeddingConfig(
          embedding_dimension=5
      )
      context.add_to_collection("first", config)
      context.add_to_collection("second", config)
      collections = context.get_all_collection()
      self.assertLen(collections, 2)
      context.clear_all_collection()
      collections = context.get_all_collection()
      self.assertLen(collections, 0)
  
file_path: neural-structured-learning/research/carls/context_test.py
imports: from research.carls import context
  from research.carls import dynamic_embedding_config_pb2
  import tensorflow
label_desc: Use image node_id 3 for calling the ContextTest obj's underlying member method code with example usage: obj.testClearAllCollection() without return types