javax.annotation:javax.annotation-api:1.3.2

package org.example.com.ui.e4

import javax.annotation.Nonnull;  // generated by quick fix
import javax.annotation.PostConstruct; // not generated by quick fix, but code completion shows 'PostConstruct' as option after typing 'import javax.annotation.P' but the type cannot be resolved
import javax.annotation.PreDestroy; // same as above with PostConstruct

import org.eclipse.fx.core.di.LocalInstance;

import javafx.fxml.FXMLLoader;
import javafx.scene.layout.BorderPane;

public class MyE4UIComponent {
    
    @PostConstruct
    void init(final BorderPane parent, @LocalInstance final FXMLLoader loader) {
	// add stuff to parent here
    }

    @Nonnull //no problem here, it resolves the annotation and generates the import statement 
    String getNothing() {
	return "nothing";
    }
    
    @PreDestroy // cannot resolve here
    void doNothing() {
    }
}