code: private static void setImageDescriptors(IAction action, String type,
  			String relPath)
  	{
  		ImageDescriptor id = create("d" + type, relPath, false); //$NON-NLS-1$
  		if (id != null)
  			action.setDisabledImageDescriptor(id);
  
  		/*
  		 * id= create("c" + type, relPath, false); //$NON-NLS-1$ if (id != null) action.setHoverImageDescriptor(id);
  		 */
  
  		ImageDescriptor descriptor = create("e" + type, relPath, true); //$NON-NLS-1$
  		action.setHoverImageDescriptor(descriptor);
  		action.setImageDescriptor(descriptor);
  	}
docs: ---- Helper methods to access icons on the file system --------------------------------------