docs: public URL getResource(String resourceName, BeanContextChild child)
  	{
  		if (resourceName == null || child == null)
  		{
  			throw new NullPointerException();
  		}
  		if (!contains(child))
  		{
  			throw new IllegalArgumentException(Messages.getString("beans.6D"));
  		}
  
  		return ClassLoader.getSystemResource(resourceName);
  	}