code: @CheckResult
      @NonNull
      public static PowerAdapter concat(@NonNull Collection<? extends PowerAdapter> adapters) {
          checkNotNull(adapters, "adapters");
          if (adapters.isEmpty()) {
              return EMPTY;
          }
          return new ConcatAdapterBuilder().addAll(adapters).build();
      }
docs: Creates a composite adapter containing the items of all of the specified adapters in order.