Rserve::REXP::Unknown - R object not representable in Rserve
use Rserve::REXP::Unknown;
my $unknown = Rserve::REXP::Unknown->new(4);
say $unknown->sexptype;
say $unknown->to_perl;
An object of this class represents an R object that's currently not representable by the Rserve protocol.
Rserve::REXP::Unknown
inherits from Rserve::REXP and adds no methods of its own.
The R SEXPTYPE of the object.
The Perl value of the unknown type is undef
.