How to delete an item created with createVirtualItem?

[HmiGuide]

With the function shmi.createVirtualItem(options [, setvalueCallback]) described in the WebIQ docu you can create virtual items at runtime.

I need the virtual items only temporary, so I want to  delete them again when I close the panel.

How can I delete this virtual items?

[webiq-sk · Accepted solution]

Deleting virtual items is currently not officially supported , but as these are simply JavaScript variables that only take up a couple of bytes this is usually not an issue. If you close a panel widget and open it again the overhead of creating them again would have more impact than keeping it, but you still would not notice it anyway.