This is a first attempt to add a frailty generator: as the williamson generator, it owuld be constructed from univariate distribution, but the distribution would be used as a frailty distribution and not as the williamson distribution.
This could be really usefull to streamline the process and reduce bugs in the alreayd implemented frailty generators (clayton, gumbel, amh, etc...)
This is a first attempt to add a frailty generator: as the williamson generator, it owuld be constructed from univariate distribution, but the distribution would be used as a frailty distribution and not as the williamson distribution.
This could be really usefull to streamline the process and reduce bugs in the alreayd implemented frailty generators (clayton, gumbel, amh, etc...)