code: @CheckResult
      @NonNull
      public static PowerAdapter concat(@NonNull PowerAdapter... adapters) {
          checkNotNull(adapters, "adapters");
          if (adapters.length == 0) {
              return EMPTY;
          }
          if (adapters.length == 1) {
              return adapters[0];
          }
          return new ConcatAdapterBuilder().addAll(adapters).build();
      }
docs: Creates a composite adapter containing the items of all of the specified adapters in order.