code: def get_event_start(event_buffer, event_format):
      
  
      if event_format == "csv":
          return get_csv_event_start(event_buffer)
      elif event_format == "xml":
          return get_xml_event_start(event_buffer)
      else:
          return get_json_event_start(event_buffer)
docs: dispatch event start method based on event format type