implement a linked list in typescript

1	class LinkedListItem {
2		value: any;
3		next: LinkedListItem;
4
5		constructor(val) {
6			this.value = val;
7			this.next = null;
8		}
9	}
10

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7	class LinkedList {
8		private head: LinkedListItem;
9		constructor(item: LinkedListItem) {
10			this.head = item;
11		}
12	}
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