The javafx.geometry.Pos library does not include in javafx

I’m learning javafx, but for some reason I can’t see the class javafx.geometry.Pos and, accordingly, I can’t set it in any way, for example root.setAlignment(Pos.CENTER); It says that Pos is not an allowed character. And in the project file Pos.class is marked with an excellent icon (you can see it in the photo). What could be the problem? Inserted import javafx.geometry.Pos; It also writes an error.

import javafx.application.Application;
import javafx.scene.Scene;
import javafx.scene.control.Label;
import javafx.scene.layout.FlowPane;
import javafx.stage.Stage;
import javafx.geometry.*;
// import javafx.geometry.Pos; not available

public class JavaFXAlignment extends Application {

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

    @Override
    public void start(Stage primaryStage) {

        Label label1 = new Label("Label1");
        Label label2 = new Label("Label2");

        FlowPane root = new FlowPane(10, 10, label1, label2);
//        root.setAlignment(Pos.CENTER); // doesn't work Pos.!?
        Scene scene = new Scene(root, 300, 150);
        primaryStage.setScene(scene);

        primaryStage.setTitle("FlowPane in JavaFX");

        primaryStage.show();
    }
}