LookupItemPreferencePolicy dropped? Follow

I found my plugin(esnippet) can not work under 10762, and  I found LookupItemPreferencePolicy can not found, is it dropped. How can I change my code to new API.  Code as following:
    lookupManager.showLookup(editor, items, new LookupItemPreferencePolicyImpl(editor, offset1, offset2, currentPsiFile));
thanks.