Reconstructing Notify module

crates/notify/src/rules/target_id_set.rs

@@ -0,0 +1,15 @@
+use crate::arn::TargetID;
+use std::collections::HashSet;
+
+/// TargetIDSet - A collection representation of TargetID.
+pub type TargetIdSet = HashSet<TargetID>;
+
+/// Provides a Go-like method for TargetIdSet (can be implemented as trait if needed)
+#[allow(dead_code)]
+pub(crate) fn new_target_id_set(target_ids: Vec<TargetID>) -> TargetIdSet {
+    target_ids.into_iter().collect()
+}
+
+// HashSet has built-in clone, union, difference and other operations.
+// But the Go version of the method returns a new Set, and the HashSet method is usually iterator or modify itself.
+// If you need to exactly match Go's API style, you can add wrapper functions.