/guava/android/guava/src/com/google/common/util/concurrent/CollectionFuture.java
result.add( element != null ? value : null) ;
result.add ( element != null ? element.value : null ) ;
init(); } @Override public List<@Nullable V> combine(List<@Nullable Present<V>> values) { List<@Nullable V> result = newArrayListWithCapacity(values.size()); for (Present<V> element : values) { <extra_id_0> } return unmodifiableList(result); } } private static final class Present<V extends @Nullable Object> { @ParametricNullness final V value;