code: def call(self, additional_fields, restriction, shape, depth, max_items, offset):
          
          from .folders import Folder
          roots = {f.root for f in self.folders}
          if len(roots) != 1:
              raise ValueError('FindFolder must be called with folders in the same root hierarchy (%r)' % roots)
          root = roots.pop()
          for elem in self._paged_call(payload_func=self.get_payload, max_items=max_items, **dict(
              additional_fields=additional_fields,
              restriction=restriction,
              shape=shape,
              depth=depth,
              page_size=self.chunk_size,
              offset=offset,
          )):
              if isinstance(elem, Exception):
                  yield elem
                  continue
              yield Folder.from_xml(elem=elem, root=root)
docs: Find subfolders of a folder.
  
          :param additional_fields: the extra fields that should be returned with the folder, as FieldPath objects
          :param shape: The set of attributes to return
          :param depth: How deep in the folder structure to search for folders
          :param max_items: The maximum number of items to return
          :param offset: the offset relative to the first item in the item collection. Usually 0.
          :return: XML elements for the matching folders