An image registry maintains a mapping between symbolic image names and SWT image objects or special image descriptor objects which defer the creation of SWT image objects until they are needed.
An image registry owns all of the image objects registered with it, and automatically disposes of them when the SWT Display that creates the images is disposed. Because of this, clients do not need to (indeed, must not attempt to) dispose of these images themselves.
Clients may instantiate this class (it was not designed to be subclassed).
Unlike the FontRegistry, it is an error to replace images. As a result there are no events that fire when values are changed in the registry
@noextend This class is not intended to be subclassed by clients.