Create server image didn't return image->id

[numitec]

Hello there,

is it possible to return object id when it is created a vm snapshot? On CLI we get a summary with image ID:

[root@eustackio ~(keystone_admin)]# openstack server image create --name snapshot_test vm_test
+------------------+-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| Field            | Value                                                                                                                                                                                                                                                     |
+------------------+-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| checksum         | None                                                                                                                                                                                                                                                      |
...
| file             | /v2/images/bef4a0b5-c987-4fc2-b8fc-454819b6fac9/file                                                                                                                                                                                                      |
| id               | bef4a0b5-c987-4fc2-b8fc-454819b6fac9                                                                                                                                                                                                                      |
| min_disk         | 1                                                                                                                                                                                                                                                         |
..                                                                                                                                                                                                |
| visibility       | private                                                                                                                                                                                                                                                   |
+------------------+-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+

But on the samples, createImage didn't return an image object when we create an snapshot of a server:

$image = $server->createImage([
    'name' => '{imageName}',
]);

print_r( $image) // ==> NULL

Thank you.