$15\mathrm{.}2\mathrm{.}1$: Remove and return the first element of a linked list.

$\backslash (591354\mathrm{.}3921188.$ q $\backslash$times $3$ z q y $7\backslash )$

Complete this method for removing and returning the first element of a linked list. If the list is empty, return null

$```$ Lists.java

import java.util.Iterator;

import java.util.LinkedList;

public class Lists

$\{$

public static String removeFirst$($LinkedList strings$)$

$\{$

Iterator iter $=$ strings.iterator$()$;

String result $=$ null;

$/*$ Your code goes here $*/$

return result;

$\}$

$\}$

$```$