ContainPlugin Not Seems To Work In Gazebo 9

Issue #2618 new
Former user created an issue

http://gazebosim.org/tutorials?tut=contain_plugin&cat=plugins#TopicsinGazebo7,8,and9+

By following the tutorial above, I have concluded that the contain plugin is missing in gazebo 9.8.0. Also there are no tutorials about ignition transport topics for the plugins as well.