'Return the current ``<w:sectPr>`` element after adding a clone of it
in a new ``<w:p>`` element appended to the block content elements.
Note that the "current" ``<w:sectPr>`` will always be the sentinel
sectPr in this case since we\'re always working at the end of the
block content.'

def add_section_break(self):

    sentinel_sectPr = self.get_or_add_sectPr()
    cloned_sectPr = sentinel_sectPr.clone()
    p = self.add_p()
    p.set_sectPr(cloned_sectPr)
    return sentinel_sectPr
