how can i limit queue to one process at a time

[sohailahmad07]

i want laravel excel to process only one file at a time how can i do that

for example if i upload csv1 and csv2 one after another i want the laravel excel to first process csv1 and then process csv2

not both simantously

here my code

class UsersInvitation implements OnEachRow,
    WithHeadingRow,
    SkipsOnFailure,
    WithValidation,
    WithChunkReading,
    WithEvents,
    ShouldQueue
{

public function onRow(Row $row)
  {
    // add the row to the database

   }
}

calling the user invitation in livewire
Excel::queueImport(new UsersInvitation(), $this->file)->allOnQueue('invitation');