Optimizing Models with Grappler

I read about Grappler and that it can optimize TF models, which is an interesting feature.

I use keras to create, train and save models, and also convert them to tflite in order to deploy them on other systems. My question is, whether this optimization is already integrated into keras and / or the tflite conversion.

It seems like quite a big topic to get into, so if it already happens automatically, I don’t want to spend so much time on it.