pub unsafe extern "C" fn gtk_constraint_layout_add_constraints_from_description(
    layout: *mut GtkConstraintLayout,
    lines: *const *const c_char,
    n_lines: size_t,
    hspacing: c_int,
    vspacing: c_int,
    error: *mut *mut GError,
    first_view: *const c_char,
     ...
) -> *mut GList