// Setting this to `false` is an experimental feature and quantization may
  // fail. To quantize models larger than 2 GiB, this should be set to `false`.
  // If not set, it defaults to `true`.
  optional bool freeze_all_variables = 9;

  // Enables channel-wise quantization. By default, channel-wise quantization is
  // not applied regardless of the op support. Currently, it is supported for