shinystan objectsSee as.shinystan for documentation on creating 
  shinystan objects and eight_schools for an example
  object.
model_name("character") Model name.
param_names("character") Parameter names.
param_dims("list") Parameter dimensions.
posterior_sample("array") MCMC sample.
summary("matrix") Summary stats for posterior_sample.
sampler_params("list") Sampler parameters (for certain Stan
models only).
n_chain("integer") Number of chains.
n_iter("integer") Number of iterations per chain.
n_warmup("integer") Number of warmup iterations per chain.
user_model_info("character") Notes to display on the
Notepad page in the 'ShinyStan' GUI.
model_code("character") Model code to display on the
Model Code page in the 'ShinyStan' GUI.
misc("list") Miscellaneous, for internal use.
Muth, C., Oravecz, Z., and Gabry, J. (2018) User-friendly Bayesian regression modeling: A tutorial with rstanarm and shinystan. The Quantitative Methods for Psychology. 14(2), 99--119. https://www.tqmp.org/RegularArticles/vol14-2/p099/p099.pdf
as.shinystan for creating shinystan objects.
drop_parameters to remove parameters from a
  shinystan object.
generate_quantity to add a new quantity to a
  shinystan object.
shinystan-metadata to view or change metadata
  associated with a shinystan object.