code: def iter_intersecting(self, iterable, key=None, descending=False):
          
          return _ContainsVersionIterator(self, iterable, key, descending,
              mode=_ContainsVersionIterator.MODE_INTERSECTING)
docs: Like `iter_intersect_test`, but returns intersections only.
  
          Returns:
              An iterator that returns items from `iterable` that intersect.