Aggregator<?> agg = InstantiationUtil.instantiate(aggWithName.getAggregator(), Aggregator.class);
aggregators.put(aggWithName.getName(), agg);
}
// instantiate the aggregator convergence criterion
if (taskConfig.usesConvergenceCriterion()) {
Class<? extends ConvergenceCriterion<Value>> convClass = taskConfig.getConvergenceCriterion();
convergenceCriterion = InstantiationUtil.instantiate(convClass, ConvergenceCriterion.class);
convergenceAggregatorName = taskConfig.getConvergenceCriterionAggregatorName();
Preconditions.checkNotNull(convergenceAggregatorName);
}