Init. Map does not function and only working on backend at the moment.

node_modules/side-channel/index.d.ts

@@ -0,0 +1,27 @@
+declare namespace getSideChannel {
+	type Key = unknown;
+	type ListNode<T> = {
+		key: Key;
+		next: ListNode<T>;
+		value: T;
+	};
+	type RootNode<T> = {
+		key: object;
+		next: null | ListNode<T>;
+	};
+	function listGetNode<T>(list: RootNode<T>, key: ListNode<T>['key']): ListNode<T> | void;
+	function listGet<T>(objects: RootNode<T>, key: ListNode<T>['key']): T | void;
+	function listSet<T>(objects: RootNode<T>, key: ListNode<T>['key'], value: T): void;
+	function listHas<T>(objects: RootNode<T>, key: ListNode<T>['key']): boolean;
+
+	type Channel = {
+		assert: (key: Key) => void;
+		has: (key: Key) => boolean;
+		get: <T>(key: Key) => T;
+		set: <T>(key: Key, value: T) => void;
+	}
+}
+
+declare function getSideChannel(): getSideChannel.Channel;
+
+export = getSideChannel;