Remove last occurrence at the circular singly linked list

public class SinglyLinkedList implements LinkedListInterface { // Do not add new instance variables or modify existing ones.  private LinkedListNode head; private int size; 

......

/**  * Removes the last copy of the given data from the list.  *  * Must be O(n) for all cases.  *  * @param data the data to be removed from the list  * @return the removed data occurrence from the list itself (not the data  * passed in), null if no occurrence  * @throws java.lang.IllegalArgumentException if data is null  */ @Override public T removeLastOccurrence(T data) { 

//code

}

...

}