code: public static EvaluationCell getEvaluationCell(EvaluationWorkbook evaluationWorkbook, IA1Address addr) {
          return ((PoiProxyWorkbook) evaluationWorkbook).getSheet(0).getCell(addr.row(), addr.column());
      }
docs: Returns {@link EvaluationCell} of given {@link EvaluationWorkbook}.
  {@link EvaluationWorkbook} should be created with {@link #toEvaluationWorkbook(Workbook)} method.