code: func (s *PublicTransactionPoolAPI) GetRawTransactionByBlockNumberAndIndex(ctx context.Context, blockNr rpc.BlockNumber, index hexutil.Uint) hexutil.Bytes {
  	if block, _ := s.b.BlockByNumber(ctx, blockNr); block != nil {
  		return newRPCRawTransactionFromBlockIndex(block, uint64(index))
  	}
  	return nil
  }
docs: // GetRawTransactionByBlockNumberAndIndex returns the bytes of the transaction for the given block number and index.