Adds a resource with target target, USN usn, and location location to
this.
If the resource group is set [property@GSSDP.ResourceGroup:available], it will be announced right away.
The resource id that is returned by this function can be used with [method@GSSDP.ResourceGroup.remove_resource].
| this | |
| target |
The resource's target |
| usn |
The resource's USN |
| location |
The resource's location |
|
The ID of the added resource. |