The $variable_skeleton() method returns the variable skeleton
needed by utils::relist() to re-structure a vector of constrained
parameter values to a named list.
variable_skeleton(transformed_parameters = TRUE, generated_quantities = TRUE)log_prob(), grad_log_prob(), constrain_variables(),
unconstrain_variables(), unconstrain_draws(), variable_skeleton(),
hessian()
if (FALSE) { # \dontrun{
fit_mcmc <- cmdstanr_example("logistic", method = "sample", force_recompile = TRUE)
fit_mcmc$variable_skeleton()
} # }