Convenient access to the variance gradient at a single point in kriging surrogates

Convenient access to the variance gradient at a single point in kriging surrogates: a task in MiMo-V2.6-RL-harbor-code: MiMo-V2.6-RL Code (Harbor) (Harbor dataset). I'm using KRG (and the MFK variants) for some Bayesian-optimization-flavoured work where, at a candidate point x , I need the…