Private constructor prevents instantiation of the instance from outside of the class // nothing to initialize
// nothing to initialize
getModels().put(modelUri,model);
return getModels().containsKey(modelUri);
return new PolicySourceModelContext();
if (null==policyModels) { policyModels = new HashMap<URI,PolicySourceModel>(); } return policyModels;
return getModels().get(modelUri);
// TODO: implement throw new UnsupportedOperationException();
return policyModels.toString();