Function gtk4_sys::gtk_color_dialog_choose_rgba

pub unsafe extern "C" fn gtk_color_dialog_choose_rgba(
    self_: *mut GtkColorDialog,
    parent: *mut GtkWindow,
    initial_color: *const GdkRGBA,
    cancellable: *mut GCancellable,
    callback: GAsyncReadyCallback,
    user_data: gpointer
)

Available on crate feature v4_10 only.