Member rclcpp::Node::set_on_parameters_set_callback (rclcpp::Node::OnParametersSetCallbackType callback): Use add_on_set_parameters_callback instead. With this method, only one callback can be set at a time. The callback that was previously set by this method is returned or nullptr if no callback was previously set.
Member rclcpp::node_interfaces::NodeParametersInterface::set_on_parameters_set_callback (OnParametersSetCallbackType callback)=0: Use add_on_set_parameters_callback instead.