private static function _removeWildcardKeys($validKeys, $invalidKeys)
{
foreach ($validKeys as $key) {
if (stristr($key, '[_anyKey_]')) {
$wildcardKey = str_replace('[_anyKey_]', '', $key);
foreach ($invalidKeys as $index => $invalidKey) {
if (stristr($invalidKey, $wildcardKey)) {
unset($invalidKeys[$index]);
}
}
}
}
return $invalidKeys;
}