Making onnx-safe option overrideable

                       help='Use OpenAIs GeLU implementation. This option'

                       'should not be used unless for backward compatibility'

                       'reasons.')

    group.add_argument('--onnx-safe', action='store_true',

    group.add_argument('--onnx-safe', type=bool, required=False,

                       help='Use workarounds for known problems with Torch ONNX exporter')

    return parser