code: def set_multiple(self, **kwargs):
          
          quiet = False
          if not kwargs:
              return
          cmd = ["heroku", "config:set"]
          for k in sorted(kwargs):
              cmd.append("{}={}".format(k, quote(str(kwargs[k]))))
              if self._is_sensitive_key(k):
                  quiet = True
          cmd.extend(["--app", self.name])
          if quiet:
              self._run_quiet(cmd)
          else:
              self._run(cmd)
docs: Configure multiple app key/value pairs