the GtkCellAreaContext for this row of data.
the GtkWidget that @area is rendering to
the GtkSnapshot to draw to
the @widget relative coordinates for @area’s background
the @widget relative coordinates for @area
the GtkCellRendererState for @area in this row.
whether @area should paint focus on focused cells for focused rows or not.
Snapshots @area’s cells according to @area’s layout onto at the given coordinates.