[NTG-context] Defineenumeration head offset

Dear list, Is there a trick to not apply the leftoffset to the header of a defineenumeration? MWE: \definetextbackground [textFrameEx] [ frame=off, framecolor=darkgreen, rulethickness=2ex, background=, location=paragraph, leftoffset=2.25ex, rightoffset=2.25ex, after={\hrule} ] \defineenumeration [example] [ text=Example, headalign=middle, headcolor=white, headcommand={\inframed[background=color,backgroundcolor=darkgreen,width=\textwidth]}, number=no, before={% \starttextbackground[textFrameEx] }, after={% \stoptextbackground% }, ] \starttext \startexample Blablabla \stopexample \stoptext