The validation itself is performed after fulfilling the condition.
The condition is checked by a defined validator.
/**
* Adds a new conditional subchain and returns its instance.
*
* @param \Jyxo\Input\Chain\Conditional $chain
* @return \Jyxo\Input\Chain\Conditional
*/
public function addCondition(\Jyxo\Input\Chain\Conditional $chain) : self
{
$chain->setParent($this);
$this->chain[] = [self::CONDITION, $chain];
return $chain;
}