code: @Override
      public String readValue(String column, int line) throws TechnicalException {
          final int colIndex = columns.indexOf(column);
          try {
              final CSVReader reader = openInputData();
              return reader.readAll().get(line)[colIndex];
          } catch (final IOException e) {
              throw new TechnicalException(Messages.getMessage(TechnicalException.TECHNICAL_ERROR_MESSAGE) + e.getMessage(), e);
          }
      }
docs: {@inheritDoc}