Retrieving Selected Items from Filter in JMP Graph Using JSL

[#1]

In JMP, the values entered in the Text edit box can be retrieved using get text(); for items in the List box, they can be retrieved using get items().
Is there a way to get the currently selected items in the Filter of the current Graph? In the JSL below, I hope that when the Saving button above is pressed, I can obtain the items selected by the user in the Filter. How can I achieve this?
For example, how should I record that the user has selected "14 years old" in the Age Filter?

New Window( "Chamber condition checker", 
SavingButton=Button Box( "Save filter setting",),
	Graph Builder(
		Size( 528, 456 ),
		Show Control Panel( 0 ),
		Variables( X( :weight ), Y( :height ) ),
		Elements( Points( X, Y, Legend( 36 ) ), Smoother( X, Y, Legend( 37 ) ) ),
		Local Data Filter( Add Filter( columns( :age ), Where( :age == 12 ), Display( :age, N Items( 6 ) ) ) )
	)
);

[#2]

You can use << Get Where clause on the filter object

Names Default To Here(1);

Names Default To Here(1); 

dt = Open("$SAMPLE_DATA/Big Class.jmp");

gb = dt << Graph Builder(
	Size(528, 456),
	Show Control Panel(0),
	Variables(X(:weight), Y(:height)),
	Elements(Points(X, Y, Legend(36)), Smoother(X, Y, Legend(37))),
	Local Data Filter(Add Filter(columns(:age), Where(:age == 12), Display(:age, N Items(6))))
);

((gb << Top Parent)["Local Data Filter"]  << Get Scriptable Object) << Get where clause;

[#3]

To get the selected rows, talk to the LDF and ask : Get Filtered rows()

Names Default To Here(1); 

dt = Open("$SAMPLE_DATA/Big Class.jmp");

gb = dt << Graph Builder(
	Size(400, 400),
	Show Control Panel(0),
	Variables(X(:weight), Y(:height)),
	Elements(Points(X, Y)),
	Local Data Filter( Add Filter(columns(:age), Where(:age == 14)))
);

(current report()["Local Data Filter"]  << Get Scriptable Object) << Get Filtered  rows;

Often I want to create a subset with the selected rows.
To generate such a subset, you can click on  
in the GraphBuilder (aka Report) Toolbar which can be downloaded from the Markeplace: https://marketplace.jmp.com/appdetails/Graph+Builder+Toolbar