Function gtk_sys::gtk_builder_extend_with_template

pub unsafe extern "C" fn gtk_builder_extend_with_template(
    builder: *mut GtkBuilder, 
    widget: *mut GtkWidget, 
    template_type: GType, 
    buffer: *const c_char, 
    length: size_t, 
    error: *mut *mut GError
) -> c_uint