public SelectExpression(String multiplicity , String className , Expression condition ) { super() ; this.className = className ;
public SelectExpression(int multiplicity, metamodel.Class theClass, Expression condition ) { super(); this.theClass = theClass;
    public SelectExpression(String multiplicity , String className , Expression condition ) {                super() ;         this.className = className ;        this.multiplicity = multiplicity ;         if ( condition != null ) {            this.hasCondition = true ;             this.condition = condition ;          }    }