/**
* Return a promise for async requests.
*
* @param string $method
* @param string $url
* @param array $body
* @param array $query
* @param array $headers
*
* @return \GuzzleHttp\Promise\PromiseInterface
*/
public function requestAsync($method, $url, $body = [], $query = [], $headers = [])
{
if (!empty($body)) {
$body = encode($body);
$headers['Content-Type'] = 'application/json';
} else {
$body = null;
}
$headers = array_merge($this->global_headers, $headers);
return $this->client->requestAsync($method, $url, ['query' => $query, 'body' => $body, 'headers' => $headers]);
}
/**
* Return the value of this object as an object.
*
* @return string
*/
public function __toString()
{
return encode($this->all());
}