Mutator codelab

Category Codelab Component

Create a Custom Mutator UI

Is your feature request related to a problem? Please describe.

We have a sample for a custom mutator, and documentation on mutators generally, but a codelab may be helpful.

Additional context

https://developers.google.com/blockly/guides/create-custom-blocks/extensions https://github.com/google/blockly/issues/1747 http://bekawestberg.me/blog/mutator-api/