I want to resolve PsiClasses from my custom language PsiReference elements. I
don't know where to start because PsiSearchHelper, PsiResolveHelper, etc. are
not documented. I want to search for a class with a specific name, which extends
a specific type, using the same scope rules that some class in a specific source
root would be use to resolve (unqualified) classname.
I try to use PsiResolveHelper but when I call
PsiResolveHelper("SomeClassInClasspath", getContext()) from a PsiElement of my
custom language, it returns null, even though the class is definitely there.
Can someone help?