gaussian            identity    identity_func
gaussian            log         exp
gaussian            inverse     inv_func
binomial            logit       inv_logit
binomial            probit      inv_Phi
binomial            cauchit     inv_cauchit_func
binomial            log         exp
binomial            cloglog     inv_cloglog
Gamma               inverse     inv_func
Gamma               identity    identity_func
Gamma               log         exp
poisson             log         exp
poisson             identity    identity_func
poisson             sqrt        square_func
inverse.gaussian    1/mu^2      inv_square_func
inverse.gaussian    inverse     inv_func
inverse.gaussian    identity    identity_func
inverse.gaussian    log         exp
survival_Cox        identity    identity_func
survival_AFT        identity    identity_func
