Set the folder name. Use to organize targets in an IDE.

Targets with no FOLDER property will appear as top level entities in IDEs like Visual Studio. Targets with the same FOLDER property value will appear next to each other in a folder of that name. To nest folders, use FOLDER values such as ‘GUI/Dialogs’ with ‘/’ characters separating folder levels.

This property is initialized by the value of the variable CMAKE_FOLDER if it is set when a target is created.