code: def add_section(self, start_type=WD_SECTION.NEW_PAGE):
          
          new_sectPr = self._element.body.add_section_break()
          new_sectPr.start_type = start_type
          return Section(new_sectPr, self._part)
docs: Return a |Section| object representing a new section added at the end
          of the document. The optional *start_type* argument must be a member
          of the :ref:`WdSectionStart` enumeration, and defaults to
          ``WD_SECTION.NEW_PAGE`` if not provided.