docs: def can_manage(user, semester=None, pool=None, any_pool=False):
      """
      Whether a user is allowed to manage a workshift semester. This includes the
      current workshift managers, that semester's workshift managers, and site
      superusers.
      """
      if semester and user in semester.workshift_managers.all():
          return True
  
      if Manager and Manager.objects.filter(
              incumbent__user=user, workshift_manager=True,
      ).count() > 0:
          return True
  
      if pool and pool.managers.filter(incumbent__user=user).count() > 0:
          return True
  
      if any_pool and WorkshiftPool.objects.filter(
              managers__incumbent__user=user,
      ):
          return True
  
      return user.is_superuser or user.is_staff