Extra Nodes in Search Menu

Created by: vicdoval

Right now the sverchok-extra nodes don't appear on the search menu.

I have been digging into it and if I add

fx.append((str(idx),'Location','',idx))
loop_reverse['Location'] = 'SvExLadyBugLocationNode'
idx +=1

into the gather_items function https://github.com/nortikin/sverchok/blob/74f2e7b46ea4c8a10faf5a2c555d7699f129a9e8/utils/sv_extra_search.py#L100

Then the Location node appears in the search menu and loads succesfully

So it is only needed a function that returns bl_idname and class name from the valid extra nodes to make it work. But I could not find such a function. the get_extra_categories function seems return the categories with a items field but could not find the way to access them (requires a context?)
@portnov am I missing anything?

I think is quite important the nodes to appear in the search menu. Could you please throw some light into this task?