In Java 8 we can have a reference to a method of a Class\' instance. Here\'s an example
Function1 ref = a::getItem;
Since Kotlin 1.1, you can use bound callable references to do that:
val f = a::getItem
list.forEach(myObject::myMethod)
Earlier Kotlin versions don't have this feature and require you to make a lambda every time except for these simple cases.