protected void register(Map<String, BaseRequestHandler> registerOn, BaseRequestHandler handler) {
    registerOn.put(handler.getMappedUri(), handler);
  }
adds all the handlers to this registry: {@link #getHandler}, {@link #postHandler},
{@link #deleteHandler}
selendroid-server-common/src/main/java/io/selendroid/server/common/BaseServlet.java