设置method的方式与设置权限的方式类似：

//http\routing\ruleparametertraits.hpp
struct RuleParameterTraits
{
    ...
    self_t& methods(boost::beast::http::verb method)
    {
        self_t* self = static_cast<self_t*>(this);
        std::optional<HttpVerb> verb = httpVerbFromBoost(method);
        if (verb)
        {
            self->methodsBitfield = 1U << static_cast<size_t>(*verb);
        }
        return *self;
    }

    template <typename... MethodArgs>
    self_t& methods(boost::beast::http::verb method, MethodArgs... argsMethod)
    {
        self_t* self = static_cast<self_t*>(this);
        methods(argsMethod...);
        std::optional<HttpVerb> verb = httpVerbFromBoost(metho