val KClass<*>.companionObject: KClass<*>?
Platform and version requirements: Kotlin 1.1, JVM
Returns a KClass instance representing the companion object of a given class, or null if the class doesn't have a companion object.
© 2010–2018 JetBrains s.r.o.
Licensed under the Apache License, Version 2.0.
https://kotlinlang.org/api/latest/jvm/stdlib/kotlin.reflect.full/companion-object.html