code: def pre_delete(self, item: "DashboardMixin") -> None:
      security_manager.raise_for_ownership(item)
  
imports: from flask_babel import lazy_gettext
  from superset import security_manager
  from superset.dashboards.filters import DashboardAccessFilter
label_desc: Use image node_id 1 for calling the DashboardMixin obj's underlying member method code with example usage: obj.pre_delete(item) without return types