class_docstr: A feed-style parser of email.
class_docstr_tok: ["A","feed-style","parser","of","email","."]
code: def _pop_message(self):
      retval = self._msgstack.pop()
      if self._msgstack:
          self._cur = self._msgstack[-1]
      else:
          self._cur = None
      return retval
  
imports: import re
  from email import errors
  from email._policybase import compat32
  from collections import deque
  from io import StringIO
label_desc: Use image node_id 7 for calling the FeedParser obj's underlying member method code with example usage: obj._pop_message() and returns: retval