python-visualization-msgs 1.12.5-3 (amd64 binary) in ubuntu cosmic

 This package is part of Robot OS (ROS), and provides a set of
 messages used by higher level packages, such as rviz, that deal in
 visualization-specific data.
 .
 The main messages in visualization_msgs is
 visualization_msgs/Marker. The marker message is used to
 send visualization "markers" such as boxes, spheres, arrows, lines,
 etc. to a visualization environment such as
 http:///www.ros.org/wiki/rviz See the rviz tutorial
 http://www.ros.org/wiki/rviz/Tutorials for more information.
 .
 This package contains the generated Python package.