tldr: nesterov dual averaging parameters - no one should ever touch them.
this was discussed when we were developing cmdstanpy and cmdstanr. cf. add logic to `sample` function to handle dense HMC metric · Issue #28 · stan-dev/cmdstanpy · GitHub
cf this comment from Betancourt: Sampler parameters which the typical user might need to set (hmc_nuts_diag_e_adapt only) - #2 by betanalpha