docs: public static Expression concatChunksForceString(List<? extends Expression> chunks) {
      if (!chunks.isEmpty()
          && chunks.get(0).isRepresentableAsSingleExpression()
          && JsExprUtils.isStringLiteral(
              chunks.get(0).assertExprAndCollectRequires(RequiresCollector.NULL))) {
        return concatChunks(chunks);
      } else if (chunks.size() > 1
          && chunks.get(1).isRepresentableAsSingleExpression()
          && JsExprUtils.isStringLiteral(
              chunks.get(1).assertExprAndCollectRequires(RequiresCollector.NULL))) {
        return concatChunks(chunks);
      } else {
        return concatChunks(
            ImmutableList.of(LITERAL_EMPTY_STRING, Group.create(concatChunks(chunks))));
      }
    }