code: def chroot(self, new_workdir):
          
          self._chrooted_from = self.workdir
          self.set_workdir(new_workdir, chroot=True)
  
          for i, work in enumerate(self):
              new_wdir = os.path.join(self.workdir, "w" + str(i))
              work.chroot(new_wdir)
docs: Change the workir of the :class:`Flow`. Mainly used for
          allowing the user to open the GUI on the local host
          and access the flow from remote via sshfs.
  
          .. note::
              Calling this method will make the flow go in read-only mode.