DataRenderer and Tooltips

Hi Community,

is there any possibility to show the Integer-Value (and not
java.lang.Integer@XX) in tooltip when mouseover while debugging? As far
as i understand, DataRenderers were supposed to do the job, but they
seem to work for variables-window only and not for tooltip. if i define
a DataRenderer for java.lang.Integer with expression toString() i can
see the value in variables-window, but tooltip still shows me
{java.lang.Integer@XX}