public function invoice(ApiResource $resource)
{
$idField = $resource->getIdField();
$url = $this->generateUrl($resource->{$idField} . '/invoice');
$response = \Httpful\Request::post($url)->body(json_encode($resource))->sendsJson()->send();
$this->checkResponseErrors($response);
}
/**
* Updates a Resource
*
* @param mixed $code String code, or a ApiResourceInterface object with code field
* @param ApiResource $resource
* @return \Httpful\Response
*/
public function put(ApiResource $resource)
{
$idField = $resource->getIdField();
$url = $this->generateUrl($resource->{$idField});
$body = $this->createPutBody($resource);
$response = \Httpful\Request::put($url)->body($body)->sendsJson()->send();
$this->checkResponseErrors($response);
return $response;
}