commit 7bacdb553f4206eb8a172db761531eac618552d0
Author: Miguel Lavalle <miguel.lavalle@verizonmedia.com>
Date:   Thu Oct 8 16:39:01 2020 -0500

    Add address groups to callbacks resources
    
    This change adds the address groups as a resource for callbacks. This
    resource definition is used when the ML2 plugin pushes notifications to
    the agents.
    
    Change-Id: Ia17a737e50ec3dd2ee09689417bbec50becfca7a

diff --git a/neutron_lib/callbacks/resources.py b/neutron_lib/callbacks/resources.py
index 1019f6d..2bc6736 100644
--- a/neutron_lib/callbacks/resources.py
+++ b/neutron_lib/callbacks/resources.py
@@ -11,6 +11,7 @@
 #    under the License.
 
 # String literals representing core resources.
+ADDRESS_GROUP = 'address_group'
 AGENT = 'agent'
 FLOATING_IP = 'floatingip'
 NETWORK = 'network'