docs: public static <T extends Builder> List<T> getBuilder(Project<?, ?> project, Class<T> type) {
          List<T> result = Lists.newArrayList();
          DescribableList<Builder, Descriptor<Builder>> builders = project.getBuildersList();
          for (Builder builder : builders) {
              if (type.isInstance(builder)) {
                  result.add(type.cast(builder));
              }
          }
          return result;
      }