Using 'levels' in DewdropLib

[jaliborc]

I'm trying to work with levels in dewdrop. I'de like to have a menu and sub-menu like this one:

Item1
Item2 >>>>> Item2.1
Item2.2

I have tred this code to get started:

dewdrop:Register(Minimap, 'point', "TOP", 'relativePoint', "BOTTOM", 'children', function() dewdrop:AddLine('text', "Item1") dewdrop:AddLine( 'text', "Item2", 'hasArrow', true, 'value', "2") dewdrop:AddLine('text', "Item2.1", 'level', 2) dewdrop:AddLine('text', "Item2.2", 'level', 2) end)

However, I get this error message:

Dewdrop-2.0/Dewdrop-2.0.lua: 3050: attempt to index local 'button' (a nil value)

Anybody can help me?