[NTG-context] getting number from context.figurewidth

Dear list, I have the following sample: \starttext \startluacode document.sample = "xml-mkiv.pdf" context.getfiguredimensions({ document.sample }) context(context.figureheight) context.par() context(tex.dimen.paperheight) \stopluacode \stoptext Is there a way that I can get a number from context.figureheight, such as I get it from tex.dimen.paperheight? Many thanks for your help, Pablo -- http://www.ousia.tk