code: def _setup_environ(self):
          
          _pam_env_watcher.check()
          _etc_env_watcher.check()
          env = dict(self.extra_env or {})
          if self.env:
              env.update(self.env)
          self._env = TemporaryEnvironment(env)
docs: Apply changes from /etc/environment files before creating a
          TemporaryEnvironment to snapshot environment state prior to module run.