code: @CheckResult
      @NonNull
      public final PowerAdapter offset(int offset) {
          if (offset <= 0) {
              return this;
          }
          if (offset == Integer.MAX_VALUE) {
              return EMPTY;
          }
          return new OffsetAdapter(this, offset);
      }
docs: Returns a new adapter that presents all items of this adapter, starting at the specified offset.
  @param offset The item offset.
  @return A new adapter.