Prints information associated with the prior for certain 'type'
Examples
prior_help('diagonal')
#> type: mu
#> Group-level mean
#>
#> Hyperparameters:
#> - theta_mu_mean : mean of the group-level mean prior
#> - theta_mu_var : variance of the group-level mean prior
#>
#> type: Sigma
#> Group-level covariance matrix
#>
#> Hyperparameters:
#> - v : degrees of freedom on the group-level variance prior
#> - A : scale on the group-level variance prior, larger values lead to larger variances
#>