public PractitionerRole addNotAvailable(PractitionerRoleNotAvailableComponent t) { //3
      if (t == null)
        return this;
      if (this.notAvailable == null)
        this.notAvailable = new ArrayList<PractitionerRoleNotAvailableComponent>();
      this.notAvailable.add(t);
      return this;
    }
public PractitionerRole addNotAvailable ( PractitionerRoleNotAvailableComponent t ) { if ( t == null ) return this ; if ( this . notAvailable == null ) this . notAvailable = new ArrayList < PractitionerRoleNotAvailableComponent > ( ) ; this . notAvailable . add ( t ) ; return this ; }
syntactic sugar