code: def asset_save_callback(self, *args, **kwargs):
          
          tasksel = self.browser.assetbrws.selected_indexes(2)
          if not tasksel or not tasksel[0].isValid():
              self.statusbar.showMessage('No task selected! Cannot save!')
              return
  
          taskitem = tasksel[0].internalPointer()
          task = taskitem.internal_data()
          rtype = djadapter.RELEASETYPES['work']
          descriptor = self.asset_descriptor_le.text()
          if not self.check_selection_for_save(task, rtype, descriptor):
              return
  
          tfi = TaskFileInfo.get_next(task=task, releasetype=rtype,
                                      typ=self._filetype, descriptor=descriptor)
          self._save_tfi(tfi, asset=True)
docs: Callback for the shot open button
  
          :returns: None
          :rtype: None
          :raises: None