/**
* Sets the callable used to create {@link IO} instances.
*
* The callable receives four arguments:
*
* * {@link RawArgs}: The raw console arguments.
* * {@link Input}: The input.
* * {@link Output}: The output.
* * {@link Output}: The error output.
*
* The input and output instances may be `null` if none were passed to
* {@link Application::run()}.
*
* @param callable $ioFactory The {@link IO} factory callable.
*
* @return static The current instance.
*/
public function setIOFactory($ioFactory)
{
Assert::nullOrIsCallable($ioFactory, 'The IO factory must be a callable or null. Got: %s');
$this->ioFactory = $ioFactory;
return $this;
}
