Fit the model using Stan variational Bayes
fit.model.vb(dl, num.cores = default.num.cores(),
num.inits = num.cores, init.idx = 1, ...)
de.lorean object
Number of cores to run on. Defaults to default.num.cores()
Number initialisations to try. Defaults to num.cores
Which initialisation to use if only using one
Extra arguments for rstan::vb()