Calling grammar-selector whithout load sources from file system


Good day! We writing the package to work with the InterSystems Caché database management system

Specificity is that it does not keep separate source files, and, we do not load the source code in the file system and draw the tree of the project on their own, but now it’s stop working function of selection grammar (ctrl-shift-L) and is not called by “grammar-selector: show” what could be wrong?

When we open files directly from file system, we have no problems because we select file types like there:
‘fileTypes’: [