[3ds Max 2015][MaxPlus]How to determine if INode is valid

Tools 3ds Max
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#1

I might have missed something (I admit my brain is fried of late), but in Maxscript there’s a method that reports whether a node reference is null (deleted node). I can’t find the equivalent in MaxPlus. Anyone know how to validate if an INode is wrapping a null pointer in python?

#2

This is what I came up with:

def isValidNode(iNode):
    return iNode.GetUnwrappedPtr() is not None