private function mergeNewFlashes(array $keys): void
    {
        $values = \array_unique(\array_merge($this->get('_flash.new', []), $keys));

        $this->set('_flash.new', $values);
    }
private function mergeNewFlashes(array $keys): void
    {
        $values = \array_unique(\array_merge($this->get('_flash.new', []), $keys));

        $this->set('_flash.new', $values);
    }
private function mergeNewFlashes ( array $ keys ) : void { $ values = \ array_unique ( \ array_merge ( $ this -> get ( '_flash.new' , [ ] ) , $ keys ) ) ; $ this -> set ( '_flash.new' , $ values ) ; }
Merge new flash keys into the new flash array.

@param array $keys

@return void
Merge new flash keys into the new flash array .