if getRIndex(sorted, c.name) == -1 {
			sorted = append(sorted, c.name)
		}

		return nil
	}

	for _, c := range cs {
		if err = sortCallback(c); err != nil {
			return
		}
	}

	for _, name := range sorted {
		if idx := getRIndex(names, name); !cs[idx].remove {
			fns = append(fns, cs[idx].handler)
		}
	}

	return
}