Can you help me out?

8. Complete the body of longestText so it satisfies its contract. For full credit, you must use and only one return statement. Reports the text of the longest plain text node in the XMLTree t. * @paramt * @return the text of the longest plain text node in t the XMLTree *@requires [t has at least one plain text node] ensures longestText [the text of the longest plain text node in t] private static String longestText (XMLTree t) f