Defines a cell index with zero-based row and column components, as well as the properties indicating whether the index component is absolute (for example: "$D") or relative (for example: "D").
It is not related with the WorkbookTable any more. It is a zero-based row/column indices pair that stores the converted Excel's alphanumeric cell.
Indicates whether the original column index is absolute (for example: "$D") or relative (for example: "D").
Indicates whether the original row index is absolute (for example: "$15") or relative (for example: "15").
