Comment 8 for bug 1756705

I had an IRC conversation with Bob Kukura, who originally implemented HPB. He mentioned that the original intent was to expose in the API the details of the binding but the team never got to do it: http://eavesdrop.openstack.org/irclogs/%23openstack-neutron/%23openstack-neutron.2018-04-20.log.html#t2018-04-20T15:31:24