I am problems getting the scene for a Java FX menu item

I am working on a java assignment and so I am not quite a "Jedi Master" when it comes Java, and in fact more at the "trainer wheels stage", and so still coming to grips with Java FX stages and scenes.. anyway here is a some prototype code that shows the problem I am having...

[ These all reside in the testingMenuAction package]

My main class: " testingMenuAction_main.java"

package testingMenuAction;

import javafx.application.Application;
import javafx.fxml.FXMLLoader;
import javafx.scene.Parent;
import javafx.scene.Scene;
import javafx.stage.Stage;


public class testingMenuAction_main extends Application {
    
    @Override
    public void start(Stage stage) throws Exception {
        Parent root = FXMLLoader.load(getClass().getResource("/testingMenuAction/testingMenuAction.fxml"));
        
        Scene scene = new Scene(root);
        
        stage.setScene(scene);
        stage.show();
    }


    public static void main(String[] args) {
        launch(args);
    }
}

My main Java FXML file: "testingMenuAction.fxml"

<?xml version="1.0" encoding="UTF-8"?>

<?import javafx.scene.control.Menu?>
<?import javafx.scene.control.MenuBar?>
<?import javafx.scene.control.MenuItem?>
<?import javafx.scene.layout.AnchorPane?>
<?import javafx.scene.layout.VBox?>

<AnchorPane fx:id="testingMenuActionPage" prefHeight="195.0" prefWidth="494.0" xmlns="http://javafx.com/javafx/11.0.1" xmlns:fx="http://javafx.com/fxml/1" fx:controller="testingMenuAction.testingMenuActionController">
  <children>
      <VBox prefHeight="186.0" prefWidth="493.0">
         <children>
            <MenuBar>
              <menus>
                <Menu mnemonicParsing="false" text="Data">
                  <items>
                    <MenuItem fx:id="mnu_data_import" mnemonicParsing="false" text="Import File" />
                  </items>
                </Menu>
              </menus>
            </MenuBar>
         </children>
      </VBox>
  </children>
</AnchorPane>

My controller class for my Java FXML file: "testingMenuActionController.java"

package testingMenuAction;

import java.io.File;
import java.net.URL;
import java.util.ResourceBundle;
import javafx.fxml.FXML;
import javafx.fxml.Initializable;
import javafx.scene.control.MenuItem;
import javafx.scene.layout.AnchorPane;
import javafx.stage.FileChooser;
import javafx.stage.FileChooser.ExtensionFilter;
import javafx.stage.Stage;
import javafx.stage.Window;





public class testingMenuActionController implements Initializable {
    

    
    @FXML
    private AnchorPane testingMenuActionPage;
    
    @FXML
    private MenuItem mnu_data_import;
    //this tests the operation of the alert dialog
    
   //private Stage export_chooser_stage;
    


    
 
    //===================================================================================================================
    /*
     * This method will initialiise the UI
     */
    
    @Override
    public void initialize(URL url, ResourceBundle rb) 
    {
        
        //--------------------------------------------------------------------------------------------------------------------
        /*
         * This  is the mnu_data_import.setOnAction((event)
         */
            mnu_data_import.setOnAction((event) -> 
            {
                System.out.println("You clicked to Import Data");
                FileChooser fileChooser = new FileChooser();
                fileChooser.setTitle("Open Resource File");
                fileChooser.getExtensionFilters().addAll(
                 new ExtensionFilter("Text Files", "*.csv")  );
                File selectedFile = fileChooser.showOpenDialog(  mnu_data_import.getScene().getWindow()  );
                String FileNamePath = selectedFile.toString();
                System.out.println("File name and path to file :" + FileNamePath);
                
                
            });// close
  
        
    }// close public void initialize(URL url, ResourceBundle rb)     

  
    
}// close public class testingMenuActionController

The compiler is complaining with the following instruction:

"File selectedFile = fileChooser.showOpenDialog(  mnu_data_import.getScene().getWindow()  );"

Giving the following error message... "The method getScene() is undefined for the type MenuItem"

Unfortunately my experinece with Java Windows, Stage, Scenes, and Nodes is still small [as I still on my "trainer wheels.."]...

As a result, would some one be able to help me?