docstr: Stop logging to stdout.
docstr_tok: ["Stop","logging","to","stdout","."]
code: def mute(self):
      """
      Stop logging to stdout.
      """
      self.prev_level = self.streamHandler.level
      self.streamHandler.level = ERROR
      return self.prev_level
  
imports: import os
  import sys
  import logging
  from logging import getLogger
label_desc: Use image node_id 6 for calling the ParlaiLogger obj's underlying member method code with example usage: obj.mute() and returns: self