Prevent silent failure when passed unrecognized function type.
Prevent silent failure when passed unrecognized function type.

othercriteria/StochasticBlockmodel,othercriteria/StochasticBlockmodel,othercriteria/StochasticBlockmodel,othercriteria/StochasticBlockmodel,othercriteria/StochasticBlockmodel,othercriteria/StochasticBlockmodel