This package is plugin of Rviz2.
support foxy of ROS2.
mkdir -p ~/ros2/src
git clone https://github.com/k-nish/rviz_plugins
cd ~/ros2
colcon build --symlink-install
source /opt/ros/foxy/setup.bash
source ~/ros2/install/setup.bash
ros2 run rviz2 rviz2
press Panel button on the menu bar and select YesNoPublisher.