@Override
              public ImmutableSet<DeclaredType> visitArray(
                  List<? extends AnnotationValue> values, Void v) {
                return values.stream()
                    .flatMap(value -> value.accept(this, null).stream())
                    .collect(toImmutableSet());
              }
Returns the contents of a {@code Class[]}-typed "value" field in a given {@code
annotationMirror}.
service/processor/src/main/java/com/google/auto/service/processor/AutoServiceProcessor.java