code: public Router all(@NotNull final String pattern, @NotNull final Middleware... handler) {
          get(pattern, handler);
          put(pattern, handler);
          post(pattern, handler);
          delete(pattern, handler);
          options(pattern, handler);
          head(pattern, handler);
          trace(pattern, handler);
          connect(pattern, handler);
          patch(pattern, handler);
          return this;
      }
docs: Specify a middleware that will be called for all HTTP methods
  @param pattern The simple pattern
  @param handler The middleware to call