Classes of correlation structures available in the brms package.
cor_brms
is not a correlation structure itself,
but the class common to all correlation structures implemented in brms.
Avaiblable correlation structures
autoregressive process of arbitrary order
autoregressive-moving average process, with arbitrary orders for the autoregressive and moving average components
autoregressive process of the response (instead of residuals) of arbitrary order
moving average process of arbitrary order
Bayesian structural time series
fixed user-defined covariance structure