code: def update_bindings(self, old, new):
          
          #: Copy the Expression Engine
          if new._d_engine:
              old._d_engine = new._d_engine
              engine = old._d_engine
  
              #: Rerun any read expressions which should trigger
              #: any dependent writes
              for k in engine._handlers.keys():
                  try:
                      engine.update(old, k)
                  except:
                      if self.debug:
                          print(traceback.format_exc())
                      pass
docs: Update any enaml operator bindings.
  
              Parameters
              -----------
              old: Declarative
                  The existing view instance that needs to be updated
              new: Declarative
                  The new view instance that should be used for updating