code: def cron(self, cron):
      self.cron = cron
      return self
  
file_path: metaflow/metaflow/plugins/aws/step_functions/event_bridge_client.py
imports: import base64
  import json
  from hashlib import sha1
  from metaflow.util import to_bytes, to_unicode
label_desc: Use image node_id 2 for calling the EventBridgeClient obj's underlying member method code with example usage: obj.cron(cron) and returns: self