keep only one layer of non-overlapping likelihood in SumDerivative likelihoodList
keep only one layer of non-overlapping likelihood in SumDerivative likelihoodList

adamallo/beast-mcmc,beast-dev/beast-mcmc,beast-dev/beast-mcmc,beast-dev/beast-mcmc,4ment/beast-mcmc,4ment/beast-mcmc,4ment/beast-mcmc,adamallo/beast-mcmc,4ment/beast-mcmc,4ment/beast-mcmc,beast-dev/beast-mcmc,beast-dev/beast-mcmc,4ment/beast-mcmc,adamallo/beast-mcmc,adamallo/beast-mcmc,adamallo/beast-mcmc,adamallo/beast-mcmc,beast-dev/beast-mcmc