code: def after(self, dt, inc=False):
          
          if self._cache_complete:
              gen = self._cache
          else:
              gen = self
          if inc:
              for i in gen:
                  if i >= dt:
                      return i
          else:
              for i in gen:
                  if i > dt:
                      return i
          return None
docs: Returns the first recurrence after the given datetime instance. The
              inc keyword defines what happens if dt is an occurrence. With
              inc=True, if dt itself is an occurrence, it will be returned.