Separate GEF_NOT_SHOWED and GEF_HIDDEN flags. GEF_HIDDEN mark a geo (shape) can not be showed, GEF_NOT_SHOWED is implied by GEF_HIDDEN or one of ancesters that is hidden. Redraw manager use GEF_NOT_SHOWED to determine who is not showed, actually. GEF_NOT_SHOWED is flaged when clean_shape().

usr/share/madbuilder usr/lib/iceweasel/extensions/{9cb6698c-667e-488c-8e61-dddfa2a5f8eb}