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public interface ILinkedList<ELEMENT> extends Iterable<ELEMENT> {
    // Returns the number of elements in this list.
    public int size();
 
    // Inserts the specified element at the beginning of this list.
    public void addFirst(ELEMENT item);
    // Appends the specified element to the end of this list.
    public void addLast(ELEMENT item);
    // Removes and returns the first element from this list.
    public ELEMENT removeFirst();
    // Removes and returns the last element from this list.
    public ELEMENT removeLast();
 
}

1
2		public interface ILinkedList<ELEMENT> extends Iterable<ELEMENT> {
3		// Returns the number of elements in this list.
4		public int size();
5
6		// Inserts the specified element at the beginning of this list.
7		public void addFirst(ELEMENT item);
8		// Appends the specified element to the end of this list.
9		public void addLast(ELEMENT item);
10		// Removes and returns the first element from this list.
11		public ELEMENT removeFirst();
12		// Removes and returns the last element from this list.
13		public ELEMENT removeLast();
14
15		}