public static String getCellIndexLetterKey(final int columnIndex, final int rowIndex) {
		return TieConstants.CELL_ADDR_PRE_FIX + WebSheetUtility.getExcelColumnName(columnIndex)
				+ TieConstants.CELL_ADDR_PRE_FIX + rowIndex;
	}
public static String getCellIndexLetterKey(final int columnIndex, final int rowIndex) {
		return TieConstants.CELL_ADDR_PRE_FIX + WebSheetUtility.getExcelColumnName(columnIndex)
				+ TieConstants.CELL_ADDR_PRE_FIX + rowIndex;
	}
public static String getCellIndexLetterKey ( final int columnIndex , final int rowIndex ) { return TieConstants . CELL_ADDR_PRE_FIX + WebSheetUtility . getExcelColumnName ( columnIndex ) + TieConstants . CELL_ADDR_PRE_FIX + rowIndex ; }
return cell index key with column and row index. e.g. $A$0 for A1 cell.

@param columnIndex
column index.
@param rowIndex
row index.
@return key.
return cell index key with column and row index . e . g . $A$0 for A1 cell .