public function add($name): ValidatorChain
    {
        $this->validators[$name] = $this->validators[$name] ?? Validator::create();
        return $this->validators[$name];
    }
public function add($name): ValidatorChain
    {
        $this->validators[$name] = $this->validators[$name] ?? Validator::create();
        return $this->validators[$name];
    }
public function add ( $ name ) : ValidatorChain { $ this -> validators [ $ name ] = $ this -> validators [ $ name ] ?? Validator :: create ( ) ; return $ this -> validators [ $ name ] ; }
Add chain to form

@param string      $name

@return ValidatorChain
Add chain to form