[gtk: 80/88] docs: Add gtk_window_is_fullscreen

[Matthias Clasen <matthiasc src gnome org>]

commit a6bc4c95b1aec0ecb4bd151a4abd8bd281015207
Author: Matthias Clasen <mclasen redhat com>
Date:   Sat Dec 5 12:29:17 2020 -0500

    docs: Add gtk_window_is_fullscreen

 docs/reference/gtk/gtk4-sections.txt | 1 +
 1 file changed, 1 insertion(+)
---
diff --git a/docs/reference/gtk/gtk4-sections.txt b/docs/reference/gtk/gtk4-sections.txt
index 30f93aa872..d97a2ede6c 100644
--- a/docs/reference/gtk/gtk4-sections.txt
+++ b/docs/reference/gtk/gtk4-sections.txt
@@ -4589,6 +4589,7 @@ gtk_window_set_destroy_with_parent
 gtk_window_set_display
 gtk_window_is_active
 gtk_window_is_maximized
+gtk_window_is_fullscreen
 gtk_window_get_toplevels
 gtk_window_list_toplevels
 gtk_window_get_focus