This is a column of cCell . The rowId argument refers to the row either by row name (where we have enabled labels) or a row number. Where rowId optional and omitted the complete column is operated on. Where rowId is present the the cCell it addresses in the cDataColumn is operated on. 

For example

cDataColumn.Refresh will refresh the entire column, and cDataColumn("South").Refresh or cDataColumn(22) would refresh a single cell. In other words, cDataColumn(201).Refresh is equivalent to cDataColumn(201).Cell.Refresh

You can find the methods and properties documentation on github.

And the source code below, or on github.