The value is clamped to lie between [property@Gtk.Adjustment:lower]
and [property@Gtk.Adjustment:upper].
Note that for adjustments which are used in a GtkScrollbar,
the effective range of allowed values goes from
[property@Gtk.Adjustment:lower] to
[property@Gtk.Adjustment:upper] - [property@Gtk.Adjustment:page-size].
Sets the GtkAdjustment value.
The value is clamped to lie between [property@Gtk.Adjustment:lower] and [property@Gtk.Adjustment:upper].
Note that for adjustments which are used in a GtkScrollbar, the effective range of allowed values goes from [property@Gtk.Adjustment:lower] to [property@Gtk.Adjustment:upper] - [property@Gtk.Adjustment:page-size].