public function _dependencies(CacheAbstract $cache)
{
$cache->start('parent', 1);
$cache->addDependency();
echo 'parent start/';
$this->assertFalse($cache->appendCallback('nawreanaweroi'));
// invalid
$cache->appendCallback('cacheCallback');
$cache->start('child', 2);
echo '|child first|';
$cache->end(false);
echo 'parent end/';
$cache->end(false);
}
