code: @Override
      public void metadataInstalling(RepositoryEvent event) {
          log.finer("Installing " + event.getMetadata() + " to " + event.getFile());
      }
docs: /*
  (non-Javadoc)
  
  @see org.eclipse.aether.util.listener.AbstractRepositoryListener#
  metadataInstalling(org.eclipse.aether.RepositoryEvent)