public OclConstraint createInvariantConstraint(string source, string name, CoreClassifier contextualClassifier, ExpressionInOcl initialValue)
{
OclInvariantConstraint constraint = new OclInvariantConstraintImpl();
constraint.setSource(source);
constraint.setContextualClassifier(contextualClassifier);
constraint.setExpression(initialValue);
constraint.setName(name);
contextualClassifier.addInvariantConstraint(name, constraint);
return(constraint);
}