/usr/share/nav_msgs/msg/GetMapGoal.msg is in libnav-msgs-dev 1.12.3-5.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 | # ====== DO NOT MODIFY! AUTOGENERATED FROM AN ACTION DEFINITION ======
# Get the map as a nav_msgs/OccupancyGrid
|