code: def _predict(self, item):
      item = self.model_b.predict(item)
      item = self.model_c.predict(item)
      item = self.model_d.predict(item)
      time.sleep(0.2)
      return item
  
imports: import math
  import time
  from typing import Any, Dict
  import pytest
  from modelkit.core import ModelLibrary
  from modelkit.core.model import Model
  from modelkit.core.profilers.simple import SimpleProfiler
label_desc: Use image node_id 2 for calling the Pipeline obj's underlying member method code with example usage: obj._predict(item) and returns: item