diff --git a/src/apprt/gtk-ng/class.zig b/src/apprt/gtk-ng/class.zig
index b3ea70a37..708bc3e60 100644
--- a/src/apprt/gtk-ng/class.zig
+++ b/src/apprt/gtk-ng/class.zig
@@ -61,41 +61,6 @@ pub fn Common(
         /// https://gitlab.gnome.org/GNOME/glib/-/blob/2c08654b62d52a31c4e4d13d7d85e12b989e72be/gobject/gtype.h#L555-571
         /// https://gitlab.gnome.org/GNOME/glib/-/blob/2c08654b62d52a31c4e4d13d7d85e12b989e72be/gobject/gtype.h#L2673
         ///
-        /// This works because when you create a new object in GObject, the pointer
-        /// that you get back wasn't allocated using your original type struct.
-        /// Instead you get the following block of data:
-        ///
-        ///
-        ///                 ┌─────────────────┐
-        ///                 │                 │
-        ///                 │                 │
-        ///                 │    Private      │
-        ///                 │                 │
-        ///                 │                 │
-        ///                 │                 │
-        ///                 │                 │
-        ///            ┌───►├─────────────────┤
-        /// *object────┘    │                 │
-        ///                 │  TypeInstance   │
-        ///                 │                 │   ┌───►┌────────────────┐
-        ///                 │                 │   │    │                │
-        ///                 │                 │   │    │    Class       │
-        ///                 │    *g_class ────┼───┘    │                │
-        ///                 │                 │        │                │
-        ///                 └─────────────────┘        │                │
-        ///                                            │                │
-        ///                                            │                │
-        ///                                            └────────────────┘
-        ///
-        /// First is a block of data that holds the instance's private data. That private
-        /// data is accessed by taking the instance pointer and subtracting the size of the
-        /// private data to get a pointer to the data.
-        ///
-        /// Next is an instance of a TypeInstance, whose purpose is to hold a pointer
-        /// to the class instance.
-        ///
-        /// https://gitlab.gnome.org/GNOME/glib/-/blob/2c08654b62d52a31c4e4d13d7d85e12b989e72be/gobject/gtype.c#L1792-1912
-        ///
         pub fn getClass(self: *Self) ?*Self.Class {
             const type_instance: *gobject.TypeInstance = @ptrCast(self);
             return @ptrCast(type_instance.f_g_class orelse return null);