Remove all content child elements from this <w:body> element. Leave
        the <w:sectPr> element if it is present.

def clear_content(self):
        """
        Remove all content child elements from this <w:body> element. Leave
        the <w:sectPr> element if it is present.
        """
        if self.sectPr is not None:
            content_elms = self[:-1]
        else:
            content_elms = self[:]
        for content_elm in content_elms:
            self.remove(content_elm)