Inverse link function, used for GLM fitting.
inverse_link(x, link)The inverse link function applied to x.
If link is not in the above list of allowed names, NULL will be returned.
scalar, vector, or matrix input.
the link function, one of "identity", "log", "sqrt",
"logit", "probit", "cloglog", "loglog", "reciprocal";
quotes are needed (default "identity").