code: protected Class<?> deployment(ServletContext context) {
  		String clazz = context.getInitParameter(DEPLOYMENT);
  		Class<?> deployment = null;
  		
  		if (clazz != null) {
  			try {
  				deployment = Class.forName(clazz);
  			} catch (ClassNotFoundException e) {
  				throw new IllegalArgumentException(
  						"Web bootstrap failed: Deployment qualifier specified at web.xml ["
  								+ clazz + "] cannot be loaded", e);
  			}
  		}
  		
  		return deployment;
  	}
docs: Returns the deployment qualifier class specified at web.xml.
  If no deployment qualifier class is specified, this method returns
  <code>null</code>.
  
  @param context {@code ServletContext} of the current application.
  @return The deployment qualifier class specified at web.xml.