public void Test_CheckColumnValueIsNullOrEmpty()
        {
            //-----------------------------------------------------------------------------------------------------------
            // Arrange
            //-----------------------------------------------------------------------------------------------------------
            ExcelWorksheet worksheet = excelPackage.Workbook.Worksheets["TEST6"];

            //-----------------------------------------------------------------------------------------------------------
            // Act
            //-----------------------------------------------------------------------------------------------------------
            bool result1 = worksheet.CheckColumnValueIsNullOrEmpty(3, 4);
            bool result2 = worksheet.CheckColumnValueIsNullOrEmpty(2, 1);

            //-----------------------------------------------------------------------------------------------------------
            // Assert
            //-----------------------------------------------------------------------------------------------------------
            result1.Should().BeTrue();
            result2.Should().BeFalse();
        }