this.groupDestroy =
new Destroy_Group(this.epr, this.stubConf, this.pr);
kind = "a group";
} else if (EPRUtils.isEnsembleEPR(this.epr)) {
this.ensembleDestroy =
new Destroy_Ensemble(this.epr, this.stubConf, this.pr);
kind = "an ensemble";
} else {
throw new ParameterProblem(name() + " requires an instance, " +
"group, or ensemble EPR.");
}