Map of custom options depending on selected service plan.

List of volumes with their new sizes.

Optional array of storage controller configurations representing the full desired controller state
of the host after resize. Include every existing controller (by id) that should be preserved,
plus any new controllers to add. Existing controllers omitted from the array are treated as deletes;
controllers with volumes attached cannot be deleted and will fail the resize.

Must be sent alongside the volumes array in the same request — controller changes are only
processed when volumes is present in the payload. Supported on VMware and MVM.

Key for network configurations. Include id to update an existing interface.