Method basic_reference

Libs/sol/sol.hpp:9383–9385

	protected:
		basic_reference(lua_State* L, detail::global_tag) noexcept
		: basic_reference(detail::pick_main_thread<main_only>(L, L), detail::global_, detail::global_) {
		}

		basic_reference(lua_State* L, detail::global_tag, detail::global_tag) noexcept : stateless_reference(L, detail::global_), luastate(L) {
		}