seed(object)
seed(object) <- valueXdeParameter or XdeMcmc XdeParameter
and an object of class XdeMcmc are useful in different ways.
For the XdeParameter class, the seed indicates what seed was
used to initialize an MCMC chain. By contrast, an object of class
XdeMcmc contains a seed that would be useful for running
additional iterations -- the seed here is guaranteed to be different
from the seed that was used to initiate the MCMC.