In the migration guide it says:
Either generate a new project with the 2.1 archetype, or override your classes with the ones [here](https://github.com/gatling/gatling-maven/tree/gatling-maven-parent-2.1.0/gatling-highcharts-maven-archetype/src/main/scala). If you choose the latter, don't forget to fix the
simulationPackagein
Recorder.scala`.
`
How do I override my classes with the ones referred in the migration guide?