docs: def create_dvportgroup(dvs_ref, spec):
      '''
      Creates a distributed virtual portgroup on a distributed virtual switch
      (dvs)
  
      dvs_ref
          The dvs reference
  
      spec
          Portgroup spec (vim.DVPortgroupConfigSpec)
      '''
      dvs_name = get_managed_object_name(dvs_ref)
      log.trace('Adding portgroup %s to dvs \'%s\'', spec.name, dvs_name)
      log.trace('spec = %s', spec)
      try:
          task = dvs_ref.CreateDVPortgroup_Task(spec)
      except vim.fault.NoPermission as exc:
          log.exception(exc)
          raise salt.exceptions.VMwareApiError(
              'Not enough permissions. Required privilege: '
              '{0}'.format(exc.privilegeId))
      except vim.fault.VimFault as exc:
          log.exception(exc)
          raise salt.exceptions.VMwareApiError(exc.msg)
      except vmodl.RuntimeFault as exc:
          log.exception(exc)
          raise salt.exceptions.VMwareRuntimeError(exc.msg)
      wait_for_task(task, dvs_name, six.text_type(task.__class__))