code: def _domain_event_balloon_change_cb(conn, domain, actual, opaque):
      '''
      Domain balloon change events handler
      '''
      _salt_send_domain_event(opaque, conn, domain, opaque['event'], {
          'actual': actual
      }f _domain_event_balloon_change_cb(conn, domain, actual, opaque):
      '''
      Domain balloon change events handler
      '''
      _salt_send_domain_event(opaque, conn, domain, opaque['event'], {
          'actual': actual
      })
docs: Domain balloon change events handler