Motivation:
I would like to simplify creation of actions that implement org.openide.util.ContextAwareAction. In repository you can
find several places where modules c&p NodeAction implementation in order to access the context. As NodeAction subclasses
SharedClassedObject it is necessary to have 2 classes and a lot of delegating code.

Solution:
I propose to introduce new helper method 

Action org.openide.awt.Actions.contextAwareAction(
    ContextActionHandler delegate,
    String displayName,
    String iconBase,
    boolean noIconInMenu)

and interface org.openide.awt.ContextActionHandler that clients would implement to handle particular action with a given
context.

public interface ContextActionHandler {
    public boolean isEnabled(Lookup context);
    public void perform(ActionEvent e, Lookup context);
}