function _checkDefines()
{
if (isset($this->_options['defines'])) {
$defines = $this->_options['defines'];
} else {
$defines = array();
}
foreach ($this->_conditions as $name => $actions) {
foreach ($actions as $action) {
$present = in_array($name, $defines);
if (!$action[1]) {
$present = !$present;
}
if ($present) {
unset($this->_disabled[$action[0]]);
} else {
$this->_disabled[$action[0]] = true;
}
}
}
}