/**
* Helper method for PHP version < 5.3, this method can be used to
* unwire the complex object graph created by PHP_Depend, so that the
* garbage collector can free memory consumed by PHP_Depend. Please
* remember that this method will destroy all the data calculated by
* PHP_Depend, so it is unusable after a call to <b>free()</b>.
*
* @return void
* @since 0.9.12
*/
public function free()
{
if (is_object($this->_packages)) {
$this->_packages->free();
}
unset($this->_builder, $this->_packages);
}