text: const { CircularLinkedList } = PacktDataStructuresAlgorithms;
  
  const list = new CircularLinkedList();
  
  console.log('push element 15');
  list.push(15);
  console.log('list.toString() => ', list.toString());
  
  console.log('push element 16');
  list.push(16);
  console.log('list.toString() => ', list.toString());
  
  console.log('push element 17');
  list.push(17);
  console.log('list.toString() => ', list.toString());
  
  console.log(list.getElementAt( list.size( ) - 1 ) );