Method is_disposed

src/rpp/rpp/observers/observer.hpp:74–77

* @brief Observable calls this method to check if observer interested or not in emissions * * @return true if observer disposed and no longer interested in emissions * @return false if observer still interested in emissions */

         * @return false if observer still interested in emissions
         */
        bool is_disposed() const noexcept
        {
            return m_disposable.is_disposed() || m_strategy.is_disposed();
        }

        /**
         * @brief Observable calls this method to notify observer about new value.