src/Command/AbstractCommand.php
protected function addControllerArgument($required = InputArgument::REQUIRED) : void
    {
        $controller = new InputArgument('controller', $required, 'Controller name is required');
        $this->getDefinition()->addArgument($controller);
    }
protected function addControllerArgument($required = InputArgument::REQUIRED) : void
    {
        $controller = new InputArgument('controller', $required, 'Controller name is required');
        $this->getDefinition()->addArgument($controller);
    }
Add Controller Argument

@param int $required
@return void