code: def halt(self, vm_name=None, force=False):
          '''
          Halt the Vagrant box.
  
          force: If True, force shut down.
          '''
          force_opt = '--force' if force else None
          self._call_vagrant_command(['halt', vm_name, force_opt])
          self._cached_conf[vm_name] = Nonf halt(self, vm_name=None, force=False):
          '''
          Halt the Vagrant box.
  
          force: If True, force shut down.
          '''
          force_opt = '--force' if force else None
          self._call_vagrant_command(['halt', vm_name, force_opt])
          self._cached_conf[vm_name] = None
docs: Halt the Vagrant box.
  
          force: If True, force shut down.