Template dividers before blocks or sub-templates

Is there any way to add a template dividers to perch:blocks or perch:template?

I have a couple of sub-templates called within a template which I'd like to separate with a divider in the admin for the page:

<perch:if exists="image"><perch:template path="content/_responsive_image.html" rescope="parent" /></perch:if>   
<perch:blocks divider-before="Page / Post content"><perch:template path="content/_content_blocks.html" rescope="parent" /></perch:blocks>