message: Update post training quantization document to include how to use representative data set to get a fully quantized model.
diff: @@ -81,6 +81,8 @@ upper_tabs:
  path: /lite/performance/gpu
  - title: "Advanced GPU"
  path: /lite/performance/gpu_advanced
  + - title: "Quantization specification"
  + path: /lite/performance/quantization_spec
  - heading: "Build TensorFlow Lite"
  - title: "Build for iOS"
  