I lost the inport message at note

Course Support ROS Basics In 5 Days (Python)
1

here:

IV. catkin_package()

State here all of the packages that will be needed by someone that executes something from your package. All of the packages stated here must be in the package.xml as exec_depend .
IN ???

I lost the txt at here. pls check my note

2

Hi @kti.jing,

Welcome to the community!

You can go back by using the “Undo” keyboard shortcut, for example Ctrl + Z on Windows and Command-Z on Mac.

If this does not work, the ultimate workaround is that you close your browser and come back in 20 or more minutes. By that time, you will get a new VM with a brand new notebook.

If you have already left for some time, the note will be correct by the time you resume.