Add user input acquisition function?

[xinyuz1996]

May I inquire about the possibility of writing a user input acquisition function and passing it into the function calcAcq()?
For instance, if a user defines beta() <- function(mu, sigma, t){} outside the package, where t is the current epoch of iteration, is it possible for the following code to be added into calcAcq()? (e.g. Line 34 of calcAcq.R)

else if (acq == "ucb2") {
t = current epoch # Is it able to fetch
beta_out = beta(fGP_Pred$mean, GP_Pred$sd, t)
return((GP_Pred$mean + beta_out * (GP_Pred$sd)))
}