/**
  * Handle the command.
  *
  * @param  CreateConcreteCommand  $command
  * @return void
  */
 public function handle(CreateConcreteCommand $command)
 {
     $command = Concrete::create(['title' => $command->title, 'description' => $command->description, 'extra_description' => $command->extra_description, 'amount' => $command->amount, 'category_id' => $command->category_id]);
     if (!empty($command)) {
         return $command;
     }
     return false;
 }