https://www.gsrikar.com/2020/02/kotlin-android-extensions-replace-findviewbyid.html
Use Kotlin Android Extensions to Replace findViewById
Remove unnecessary code of UI element initialisations in pure Android Kotlin projects.
kotlin android extensionsusereplace
https://plugins.gradle.org/plugin/org.jetbrains.kotlin.android.extensions/2.0.0-RC2
Gradle - Plugin: org.jetbrains.kotlin.android.extensions
gradle pluginkotlin androidjetbrainsextensions