code: def dump(self, dump_value_func):
      retstr = dump_value_func(self.val)
      if isinstance(self.val, self._dict):
          return self.comment + "\n" + unicode(retstr)
      else:
          return unicode(retstr) + self.comment
  
imports: import datetime
  import io
  from os import linesep
  import re
  import sys
  from toml.tz import TomlTz
label_desc: Use image node_id 4 for calling the CommentValue obj's underlying member method code with example usage: obj.dump(dump_value_func) and returns: unknown, unknown