\HeaderA{VersionsNull}{Class "VersionsNull"}{VersionsNull}
\aliasA{initialize,VersionsNull-method}{VersionsNull}{initialize,VersionsNull.Rdash.method}
\aliasA{show,VersionsNull-method}{VersionsNull}{show,VersionsNull.Rdash.method}
\aliasA{VersionsNull-class}{VersionsNull}{VersionsNull.Rdash.class}
\keyword{classes}{VersionsNull}
\begin{Description}\relax
A class used to represent the `version' of unversioned
objects. Useful primarily for method dispatch.
\end{Description}
\begin{Section}{Methods}
The following are defined; package developers may write additional methods.
\describe{
\item[\code{new("VersionsNull", ...)}] Create a new
\code{VersionsNull-class} instance, ignoring any additional arguments.
\item[\code{show(object)}] Display ``No version''.
}
\end{Section}
\begin{Author}\relax
Biocore
\end{Author}
\begin{SeeAlso}\relax
\code{\LinkA{classVersion}{classVersion}}
\end{SeeAlso}
\begin{Examples}
\begin{ExampleCode}

obj <- new("VersionsNull")
obj

obj <- new("VersionsNull", A="1.0.0") # warning
obj

\end{ExampleCode}
\end{Examples}

