\HeaderA{identity}{Identity function}{identity}
\keyword{programming}{identity}
\begin{Description}\relax
A trivial identity function returning its argument.
\end{Description}
\begin{Usage}
\begin{verbatim}
identity(x)
\end{verbatim}
\end{Usage}
\begin{Arguments}
\begin{ldescription}
\item[\code{x}] an \R{} object.
\end{ldescription}
\end{Arguments}

