protected function filterArguments(array $arguments)
{
if (count($arguments) === 2 && is_array($arguments[1])) {
$flattenedKVs = array($arguments[0]);
$args = $arguments[1];
foreach ($args as $k => $v) {
$flattenedKVs[] = $k;
$flattenedKVs[] = $v;
}
return $flattenedKVs;
}
return $arguments;
}