docs: public void setImplicitConvergenceCriterion(String aggregatorName, ConvergenceCriterion<?> convCriterion) {
  		try {
  			InstantiationUtil.writeObjectToConfig(convCriterion, this.config, ITERATION_IMPLICIT_CONVERGENCE_CRITERION);
  		} catch (IOException e) {
  			throw new RuntimeException("Error while writing the implicit convergence criterion object to the task configuration.");
  		}
  		this.config.setString(ITERATION_IMPLICIT_CONVERGENCE_CRITERION_AGG_NAME, aggregatorName);
  	}