code: def all(self, template_id, **queryparams):
          
          self.template_id = template_id
          return self._mc_client._get(url=self._build_path(template_id, 'default-content'), **queryparams)
docs: Get the sections that you can edit in a template, including each
          section’s default content.
  
          :param template_id: The unique id for the template.
          :type template_id: :py:class:`str`
          :param queryparams: The query string parameters
          queryparams['fields'] = []
          queryparams['exclude_fields'] = []