* FluentIterable<FluentIterableTest.A> is not applicable for the arguments
     * (Iterable<FluentIterableTest.B>)
     */
    // FluentIterable.from(aIterable).append(bIterable);

    /* The following fails to compile:
     *
     * The method filter(Predicate<? super Object>) in the type FluentIterable<Object> is not
     * applicable for the arguments (Predicate<FluentIterableTest.X>)
     */

     * FluentIterable<FluentIterableTest.A> is not applicable for the arguments
     * (Iterable<FluentIterableTest.B>)
     */
    // FluentIterable.from(aIterable).append(bIterable);

    /* The following fails to compile:
     *
     * The method filter(Predicate<? super Object>) in the type FluentIterable<Object> is not
     * applicable for the arguments (Predicate<FluentIterableTest.X>)
     */