Method register

nodedb/src/event/alert/registry.rs:34–37

(&self, def: AlertDef)

    }

    pub fn register(&self, def: AlertDef) {
        let key = (def.tenant_id, def.name.clone());
        self.write_map().insert(key, def);
    }

    pub fn unregister(&self, tenant_id: u64, name: &str) -> bool {
        self.write_map()