## S3 method for class 'brmsfit_multiple'
update(object, formula., newdata = NULL, ...)

## Not run: 
library(mice)
imp <- mice(nhanes2)

# initially fit the model 
fit_imp1 <- brm_multiple(bmi ~ age + hyp + chl, data = imp, chains = 1)
summary(fit_imp1)

# update the model using fewer predictors
fit_imp2 <- update(fit_imp1, formula. = . ~ hyp + chl, newdata = imp)
summary(fit_imp2)

## End(Not run)