docs: 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)