Class unions in package distr defined for internal
purposes; these are
These classes are used internally to make available methods or to allow slots of classes to be filled with varying types. In particular
"OptionalNumeric": may contain objects of class
"NULL"; it is used e.g. for slot
nuisance of class
"ParamFamParameter", as it may or may not be present but if so
it has to be numeric.
All of these classes are virtual: No objects may be created from them.
Peter Ruckdeschel firstname.lastname@example.org
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