54     protected $_group = null;  variable in Hoa\\Exception\\Group
73         $this->_group = new \SplStack();
115         $this->_group->push(new \ArrayObject());
127         if (1 >= count($this->_group)) {
131         $this->_group->pop();
144             $this->_group->pop();
149         foreach ($this->_group->pop() as $index => $exception) {
164             1 < count($this->_group) &&
165             0 < count($this->_group->top());
176         foreach ($this->_group as $group) {
193         foreach ($this->_group as $group) {
215         $group = $this->_group->top();
235         foreach ($this->_group as $group) {
251         return $this->_group->bottom();
281         return count($this->_group);