Decorates the given label with the name of the UI column which the label is for and the index of this label within its parenting INodeContext.
Returns the decorated Label
"""
- decorateLabel :: LabelDecorator -> String -> String -> Integer -> <Proc> String
+ decorateLabel :: LabelDecorator -> String -> String -> Integer -> <Proc> Maybe String
decorateForeground :: LabelDecorator -> a -> String -> Integer -> <Proc> a
decorateBackground :: LabelDecorator -> a -> String -> Integer -> <Proc> a
decorateFont :: LabelDecorator -> Maybe a -> String -> Integer -> <Proc> Maybe a