ARIS Script: How to select data from dialog .Table

Hi guys!

Maybe you can help me. I have a question: I'm making a script that includes a function for selecting models from a list in a dialog box. I'm using .Table method for this, but I don't understand how to store selected rows in var... 
Here is code example:

    if (empty_models.length > 0){
       var columns = ['№', 'DB', 'Name']
       var columnsW = ['5','20','75']
       var columnsSetting = [Constants.TABLECOLUMN_SINGLELINE, Constants.TABLECOLUMN_SINGLELINE, Constants.TABLECOLUMN_SINGLELINE]
       var table_style = Constants.TABLE_STYLE_MULTISELECT
       var main_dialog_settings = Dialogs.createNewDialogTemplate(0,0,600,225,'List of empty models');
               
       main_dialog_settings.Text(10,10,460,15, 'Select models for delete');
       //main_dialog_settings.ListBox(10,40,580,200,empty_models,'List of empty models');
       main_dialog_settings.Table(10,40,580,200,columns,columnsSetting,columnsW,'mainTable',table_style);
       
       main_dialog_settings.OKButton()
       main_dialog_settings.CancelButton()
       
       
       var main_dialog = Dialogs.createUserDialog(main_dialog_settings);
       var input_data = main_dialog.setDlgListBoxArray('mainTable', empty_models);
       
       var bool = Dialogs.show(main_dialog)
       if (bool != 0){ 
           var selected_cells = main_dialog.getDialogElement('mainTable').getItems()
           Dialogs.MsgBox(selected_cells)
       }else{
           Dialogs.MsgBox('Window closed by user')
       }