Method ~ButtonConfig

src/ace_button/ButtonConfig.h:218–218

* If the ButtonConfig is created and deleted on the heap, a virtual * destructor is technically required by the C++ language to prevent * memory leaks. But ButtonConfig does not have any memory to leak, so * everything is fine even without a virtual destructor. This virtual * destructor definition is provided for the sole purpose of keeping the * compiler quiet.

       * statement above.
       */
      virtual ~ButtonConfig() = default;
    #endif

    /** Milliseconds to wait for debouncing. */