Makes the row header cells display a custom node for each row.
Makes the row header cells display the level number of the current row (1, 1.1, 1.2, 2, 2.1, 2.2, 2.3, ...).
Makes the row header cells display the number of the current row (1, 2, 3, ....).
An enumeration used to control the visuals of the cells in the row header column.
1.0
RowHeader,GanttChart.setRowHeaderType(RowHeaderType),GanttChart.setRowHeaderNodeFactory(Callback)