code: def _set_attr_reg(self):
          
          tmos_v = self._meta_data['bigip']._meta_data['tmos_version']
          attributes = self._meta_data['attribute_registry']
          v12kind = 'tm:asm:policies:blocking-settings:blocking-settingcollectionstate'
          v11kind = 'tm:asm:policies:blocking-settings'
          builderv11 = 'tm:asm:policies:policy-builder:pbconfigstate'
          builderv12 = 'tm:asm:policies:policy-builder:policy-builderstate'
          if LooseVersion(tmos_v) < LooseVersion('12.0.0'):
              attributes[v11kind] = Blocking_Settings
              attributes[builderv11] = Policy_Builder
          else:
              attributes[v12kind] = Blocking_Settings
              attributes[builderv12] = Policy_Builder
docs: Helper method.
  
          Appends correct attribute registry, depending on TMOS version