public Reference addHealthcareService() { //3
      Reference t = new Reference();
      if (this.healthcareService == null)
        this.healthcareService = new ArrayList<Reference>();
      this.healthcareService.add(t);
      return t;
    }
public Reference addHealthcareService ( ) { Reference t = new Reference ( ) ; if ( this . healthcareService == null ) this . healthcareService = new ArrayList < Reference > ( ) ; this . healthcareService . add ( t ) ; return t ; }
syntactic sugar