@Override public int getItemViewType(int position) {
    int index = 0;

    if (0 == position) { // 0
      return ITEM_TYPE_HEADER;
    }

    for (int i = 0; i < data.size(); i++) {

      if (i > 0) {
        index++;
        if (index == position) {
          return ITEM_TYPE_HEADER;
        }
      }

      for (int j = 0; j < data.get(i).getTransactions().size(); j++) {
        index++; // 1, 2 // 5, 6,
        if (index == position) {
          return ITEM_TYPE_TRN;
        }
      }

      index++; // 3 // 7
      if (index == position) {
        return ITEM_TYPE_FOOTER;
      }
    }

    return super.getItemViewType(position);
  }

@SuppressWarnings("ConstantConditions") @Override
  public void onBindViewHolder(RecyclerView.ViewHolder holder, int position) {
    int index = 0;

    if (0 == position) { // 0
      ((HeaderViewHolder) holder).bind(data.get(0));
    }

    for (int i = 0; i < data.size(); i++) {

      if (i > 0) {
        index++;
        if (index == position) {
          ((HeaderViewHolder) holder).bind(data.get(i));
          break;
        }
      }

      for (int j = 0; j < data.get(i).getTransactions().size(); j++) {
        index++; // 1, 2 // 5, 6,
        if (index == position) {
          ((TransactionViewHolder) holder).bind(data.get(i).getTransactions().get(j), context,
              currency, isInstallments);
          break;
        }
      }

      index++; // 3 // 7
      if (index == position) {
        ((FooterViewHolder) holder).bind(data.get(i), currency, context);
        break;
      }
    }
  }

@Override public int getItemCount() {
    int itemCount = data.size() * 2; // headers + footers
    for (CCTransactionGroup group : data) {
      itemCount += group.getTransactions().size(); // items
    }
    return itemCount;
  }