Values_1.ColumnToUnpivotSourceSpecifies a column to be unpivoted, transforming it from a column into rows with associated values.
type nonrec t = {columnName : Values_0.ColumnName.t option;The name of the column to unpivot from the source data.
*)newValue : CellValue.t option;The value to assign to this column in the unpivoted result, typically the column name or a descriptive label.
*)}