def delete_sliver (self, slice_urn, slice_hrn, creds, options):
aggregate = OSAggregate(self)
tenant_name = OSXrn(xrn=slice_hrn, type='slice').get_tenant_name()
project_name = hrn_to_os_slicename(slice_hrn)
return aggregate.delete_instances(project_name, tenant_name)
