/**
* Removes all invalid iterators from the top of the stack.
* @return void
*/
private function discardInvalid()
{
while ($this->valid() && !$this->stack->last()->valid()) {
$this->pop();
}
}
/**
* Removes all invalid iterators from the top of the stack.
* @return void
*/
private function discardInvalid()
{
while ($this->valid() && !$this->stack->last()->valid()) {
$this->pop();
}
}
