These are the natural (canonical) parameters of a distribution, such as
shape and rate for a gamma distribution or meanlog and sdlog for a
lognormal distribution. All other parameter representations (for example a
mean and standard deviation) are converted to these using
convert_to_natural().
Examples
natural_params(Gamma(shape = 1, rate = 1))
#> [1] "shape" "rate"
# a distribution type can also be given by name
natural_params("gamma")
#> [1] "shape" "rate"