Method push

extlibs/sol3/include/sol/sol.hpp:8984–8986

		basic_reference& operator=(const proxy_base<Super>& r);

		int push() const noexcept {
			return push(lua_state());
		}

		int push(lua_State* L) const noexcept {
#if defined(SOL_SAFE_STACK_CHECK) && SOL_SAFE_STACK_CHECK