[vala/staging] gtk4: Update to 4.6.0+a092986a

[Rico Tzschichholz <ricotz src gnome org>]

commit df6f639300377096c1c76eae78e68566b9c0a06e
Author: Rico Tzschichholz <ricotz ubuntu com>
Date:   Fri Jan 21 13:27:37 2022 +0100

    gtk4: Update to 4.6.0+a092986a

 vapi/gtk4.vapi | 22 +++++++++++-----------
 1 file changed, 11 insertions(+), 11 deletions(-)
---
diff --git a/vapi/gtk4.vapi b/vapi/gtk4.vapi
index ca199cc21..925518ded 100644
--- a/vapi/gtk4.vapi
+++ b/vapi/gtk4.vapi
@@ -6349,18 +6349,18 @@ namespace Gsk {
                [DestroysInstance]
                public Gsk.Transform perspective (float depth);
                public void print (GLib.StringBuilder string);
-               public unowned Gsk.Transform @ref ();
+               public unowned Gsk.Transform? @ref ();
                [DestroysInstance]
-               public Gsk.Transform rotate (float angle);
+               public Gsk.Transform? rotate (float angle);
                [DestroysInstance]
-               public Gsk.Transform rotate_3d (float angle, Graphene.Vec3 axis);
+               public Gsk.Transform? rotate_3d (float angle, Graphene.Vec3 axis);
                [DestroysInstance]
-               public Gsk.Transform scale (float factor_x, float factor_y);
+               public Gsk.Transform? scale (float factor_x, float factor_y);
                [DestroysInstance]
-               public Gsk.Transform scale_3d (float factor_x, float factor_y, float factor_z);
+               public Gsk.Transform? scale_3d (float factor_x, float factor_y, float factor_z);
                [DestroysInstance]
                [Version (since = "4.6")]
-               public Gsk.Transform skew (float skew_x, float skew_y);
+               public Gsk.Transform? skew (float skew_x, float skew_y);
                public void to_2d (out float out_xx, out float out_yx, out float out_xy, out float out_yy, 
out float out_dx, out float out_dy);
                [Version (since = "4.6")]
                public void to_2d_components (out float out_skew_x, out float out_skew_y, out float 
out_scale_x, out float out_scale_y, out float out_angle, out float out_dx, out float out_dy);
@@ -6369,13 +6369,13 @@ namespace Gsk {
                public string to_string ();
                public void to_translate (out float out_dx, out float out_dy);
                [DestroysInstance]
-               public Gsk.Transform transform (Gsk.Transform? other);
+               public Gsk.Transform? transform (Gsk.Transform? other);
                public Graphene.Rect transform_bounds (Graphene.Rect rect);
                public Graphene.Point transform_point (Graphene.Point point);
                [DestroysInstance]
-               public Gsk.Transform translate (Graphene.Point point);
+               public Gsk.Transform? translate (Graphene.Point point);
                [DestroysInstance]
-               public Gsk.Transform translate_3d (Graphene.Point3D point);
+               public Gsk.Transform? translate_3d (Graphene.Point3D point);
                public void unref ();
        }
        [CCode (cheader_filename = "gsk/gsk.h", type_id = "gsk_transform_node_get_type ()")]
@@ -13153,14 +13153,14 @@ namespace Gtk {
                public int get_bytes_in_line ();
                public unichar get_char ();
                public int get_chars_in_line ();
-               public unowned Gtk.TextChildAnchor get_child_anchor ();
+               public unowned Gtk.TextChildAnchor? get_child_anchor ();
                public Pango.Language get_language ();
                public int get_line ();
                public int get_line_index ();
                public int get_line_offset ();
                public GLib.SList<weak Gtk.TextMark> get_marks ();
                public int get_offset ();
-               public unowned Gdk.Paintable get_paintable ();
+               public unowned Gdk.Paintable? get_paintable ();
                public string get_slice (Gtk.TextIter end);
                public GLib.SList<weak Gtk.TextTag> get_tags ();
                public string get_text (Gtk.TextIter end);