code: def __next__(self):
      if self.pushes:
          self.current = self.pushes.pop()
      else:
          self.current = next(self.iterator)
      return self.current
  
imports: import sys
  import contextlib
  import functools
  import re
  import os
  from jedi._compatibility import reraise
label_desc: Use image node_id 5 for calling the PushBackIterator obj's underlying member method code with example usage: obj.__next__() and returns: self