When I used PSIReferencebase as class and returned nul from resolve, editor displayed error marks, highlighted in red etc.
After reworking my refeerence resolver to be subclass of PsiReferenceBase.Poly ( ResolveCache multi resolve forces this,
and I definitely having multiple resolution candidates ) it dows not display error marks anymore - despite returnung null
Code completion works, and I checked that isSoft() returns false
What I'm doing wrong now? ;)