public function getKeys()
    {
        $keys = array_keys($this->cache) + array_keys($this->factories);
        return array_unique($keys);
    }
public function getKeys()
    {
        $keys = array_keys($this->cache) + array_keys($this->factories);
        return array_unique($keys);
    }
public function getKeys ( ) { $ keys = array_keys ( $ this -> cache ) + array_keys ( $ this -> factories ) ; return array_unique ( $ keys ) ; }
Get all keys available

@return string[]
Get all keys available