code: def step(self, action, **kwargs):
      r = 0.0
      merge_info = {}
      for k in range(self.frame_skip):
          self.frame_count += 1
          obs, reward, done, info = self.env.step(action, **kwargs)
          r += reward
  
          for key in info.keys():
              if "reward" in key:
                  # to assure that we don't igonre other reward
                  # if new reward was added, consider its logic here
                  assert (
                      (key == "shaping_reward")
                      or (key == "r2_reward")
                      or (key == "x_offset_reward")
                  )
                  merge_info[key] = merge_info.get(key, 0.0) + info[key]
              else:
                  merge_info[key] = info[key]
  
          if info["target_changed"]:
              logger.warn(
                  "[FrameSkip] early break since target was changed"
              )
              break
  
          if done:
              break
      merge_info["frame_count"] = self.frame_count
      return obs, r, done, merge_info
  
imports: import abc
  import gym
  import math
  import numpy
  import random
  from collections import OrderedDict
  from osim.env import ProstheticsEnv
  from parl.utils import logger
  from tqdm import tqdm
label_desc: Use image node_id 2 for calling the FrameSkip obj's underlying member method code with example usage: obj.step(action) and returns: obs,  r,  done,  merge_info