docs: def relation_ids(self):
          """
          The set of IDs of the specific relation instances that this conversation
          is communicating with.
          """
          if self.scope == scopes.GLOBAL:
              # the namespace is the relation name and this conv speaks for all
              # connected instances of that relation
              return hookenv.relation_ids(self.namespace)
          else:
              # the namespace is the relation ID
              return [self.namespace]