e to a bean obtained from the container via dependency injection is a special kind of
 contextual reference, called an injected reference. Additional
 restrictions apply to the validity of an injected reference:</p>
 
 <ul>
 <li>A reference to a bean injected into a field, bean constructor or 
 initializer method is only valid until the object into which it was 
 injected is destroyed.</li>
 <li>A reference to a bean injected into a producer method is only 
 valid until the producer method bean instance tha