The warning is there because all is not just fine, in general and in
particular not in your example.
If a superclass is not virtual, the prototype object for the new class
must have a member of that class in the appropriate slot. How could it
do so in this case? As a result, your class will
I'm trying to do the following:
setClass(MyNode, representation(parent = MyNode))
[1] MyNode
Warning message:
undefined slot classes in definition of MyNode: parent(class MyNode)
I scanned the docs, but found nothing. The representation function has no
problem, it's the setClass function which
