public function executeSelectionSection()
 {
     // retrieve heroes
     // $this->heroes = HeroPeer::retrieveAll();
     //
     $this->items = ItemPeer::retrieveAll();
     $this->groupItems($this->items);
     $this->sentinelHeroes = HeroPeer::retrieveByAffiliation(HeroAffiliationPeer::retrieveByName('Sentinel'));
     $this->groupHeroes($this->sentinelHeroes);
     $this->scourgeHeroes = HeroPeer::retrieveByAffiliation(HeroAffiliationPeer::retrieveByName('Scourge'));
     $this->groupHeroes($this->scourgeHeroes);
 }