public static Predicate<ValueAttribute> isGenerateDefault() {
    return IsGenerateDefaultPredicate.INSTANCE;
  }
Predicate on instance of DiscoveredAttribute that evaluates attribute isGenerateDefault.
@return predicate on DiscoveredAttribute evaluates to 'isGenerateDefault' attribute
value-processor/src/org/immutables/value/processor/meta/ValueAttributeFunctions.java