in src/Request/Traits/AcsTrait.php [194:206]
private function resolveHostWays(&$host, $region_id)
{
$host = AlibabaCloud::resolveHostByStatic($this->product, $region_id);
// 1. Find host by map.
if (!$host && $this->network === 'public' && isset($this->endpointMap[$region_id])) {
$host = $this->endpointMap[$region_id];
}
if (!$host) {
$this->hostResolver($host, $region_id);
}
}