Everyone before you is waiting for their burgers to be ready before leaving the counter because each of the 8 cashiers goes and prepares the burger right away before getting the next order.

<img src="/img/async/parallel-burgers/parallel-burgers-01.png" class="illustration">

Then it's finally your turn, you place your order of 2 very fancy burgers for your crush and you.

   * traversal order of the collection's iterator.
   *
   * @param capacity the capacity of this queue
   * @param fair if {@code true} then queue accesses for threads blocked on insertion or removal,
   *     are processed in FIFO order; if {@code false} the access order is unspecified.
   * @param c the collection of elements to initially contain

 * @author Kevin Bourrillion
 * @since 2.0
 */
@GwtCompatible
public abstract class Ordering<T extends @Nullable Object> implements Comparator<T> {
  // Natural order

  /**
   * Returns a serializable ordering that uses the natural order of the values. The ordering throws
   * a {@link NullPointerException} when passed a null parameter.
   *

 * @author Kevin Bourrillion
 * @since 2.0
 */
@GwtCompatible
public abstract class Ordering<T extends @Nullable Object> implements Comparator<T> {
  // Natural order

  /**
   * Returns a serializable ordering that uses the natural order of the values. The ordering throws
   * a {@link NullPointerException} when passed a null parameter.
   *

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a.sort:hover {

    if (key == null) {
      int unused = keyComparator().compare(key, key);
    }
    return super.createCollection(key);
  }

  /**
   * Returns the comparator that orders the multimap keys.
   *
   * @deprecated Use {@code ((NavigableSet<K>) multimap.keySet()).comparator()} instead.
   */
  @Deprecated
  public Comparator<? super K> keyComparator() {
    return keyComparator;

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}

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*/

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}

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   * traversal order of the collection's iterator.
   *
   * @param capacity the capacity of this queue
   * @param fair if {@code true} then queue accesses for threads blocked on insertion or removal,
   *     are processed in FIFO order; if {@code false} the access order is unspecified.
   * @param c the collection of elements to initially contain