Where is the explaining for the project file in the fusetools.com?

Can you please explain on how the project file structure?

what is the mean of “Projects”: [], in the project file?

thanks

{ “InternalsVisibleTo”: [], “Packages”: [
“Fuse.Animations”, “Fuse.BasicTheme”, “Fuse.Controls”, “Fuse.Designer”, … … … …

"FuseCore"

], “Projects”: [],
“Includes”: [ “MyApp.ux:UXFile”, “NewsItem.ux:UXFile”, “Sidebar.ux:UXFile” ] }

https://fuseopen.com/docs/basics/uno-projects.html#projects

Project is to reference another unoproj file as a library.