users of my plugin reported an issue: https://github.com/jansorg/BashSupport/issues/299 .
The class PsiUtil is missing. The class is available in the community edition and is in the openapi.jar.
My understanding was, that I can use all classes which are part of the openapi.
In PhpStorm this class is missing, though.
Which classes may be used by plugins to be compatible with all plattform applications?