public function testCfgNotAppendingOfVars()
    {
        $block = new TestBlock();
        $block->addCfg(['var' => 'append', 'label' => 'test', 'type' => 'zaa-text'], false);
        $block->addCfg(['var' => 'append2', 'label' => 'test2', 'type' => 'zaa-text'], false);