code: def step(self, actions):
      return
  
imports: from __future__ import annotations
  import datetime
  import threading
  import time
  import alpaca_trade_api
  import gymnasium
  import numpy
  import pandas
  import torch
  from finrl.meta.data_processors.processor_alpaca import AlpacaProcessor
label_desc: Use image node_id 3 for calling the StockEnvEmpty obj's underlying member method code with example usage: obj.step(actions) without return types