Method operator*

tests/Issue255.cpp:13–16

    bool        operator==( const Iterator& other ) { return m_iterable == other.m_iterable && m_pos == other.m_pos; }
    bool        operator!=( const Iterator& other ) { return !( this->operator==( other ) ); }
    access_type operator*() {
      Widget tmp = m_iterable->m_storage[m_pos];
      return std::get<access_type>( tmp );
    }
    Iterator operator++() {
      m_pos++;
      return *this;