Is such a thing:
possible with the OpenAPI at the moment? Or it's not possible
with IntelliJ at all?
Many frameworks generate parts of files (java/xml, etc.) that must not be changed,
and in order to make a useful plug-in in IntelliJ for those frameworks, such a 'guarded'
functionality would be required.
Even more, that highlight could be marked with a different color on the left margin, to know
right away that it's readonly.
Thanks in advance,