code: def _save_foreach_cardinality(
      self, foreach_split_task_id, for_each_cardinality, ttl
  ):
      DynamoDbClient().save_foreach_cardinality(
          foreach_split_task_id, for_each_cardinality, ttl
      )
  
file_path: metaflow/metaflow/plugins/aws/step_functions/step_functions_decorator.py
imports: import os
  import json
  import time
  from metaflow.decorators import StepDecorator
  from metaflow.metadata import MetaDatum
  from .dynamo_db_client import DynamoDbClient
label_desc: Use image node_id 3 for calling the StepFunctionsInternalDecorator obj's underlying member method code with example usage: obj._save_foreach_cardinality(foreach_split_task_id, for_each_cardinality, ttl) without return types