Method set_stopped

include/exec/detail/shared.hpp:101–104

    STDEXEC_ATTRIBUTE(always_inline)
    constexpr void set_stopped() noexcept
    {
      __sh_state_->__complete(set_stopped_t());
    }

    [[nodiscard]]
    constexpr auto get_env() const noexcept -> __env_t<_Env> const &