I want to horizontally split an object (in this case a basic rounded rectangle) horizontally so that the text in both sections is editable separately. Unfortunately, using any of the available "Class" or "Container" objects in the palette either results in part of the shape being background-less regardless of the applied style, or the horizontal separator doesn't have the same stroke style as the outline of the shape. For example, in the image below, I would like the horizontal separator to be red, but it remains black when I apply a custom stroke style to the shape:
