Missing documentation for ppc_data and ppc_loo_pitdata

[bnicenboim]

I wanted to create new ppc_ functions, and I've noticed ppc_data.
The issue is the following:
Is the documentation of this "external" function missing?
Or is it an internal function exported mistake?

[tjmahr]

We want it to be exported. It could use documentation.

[bnicenboim]

ok, the intended use is that the user would make their own ppc_functions, right?

[tjmahr]

Or make their own custom plots. The idea is that each bayesplot function does two things.

1. Prepares the MCMC or PPC draws for plotting with ggplot2 by creating a dataframe or list of dataframes.
2. Plots the prepared data.

ppc_data() is the data-preparation function for the ppc_() plots.

[avehtari]

Documentation for ppc_data() is still missing from the page https://mc-stan.org/bayesplot/reference/PPC-distributions.html

In the same way, there is undocumented ppc_loo_pit_data() in https://mc-stan.org/bayesplot/reference/PPC-loo.html