public static class ExperimentalResolver implements ResolveCache.Resolver {
@Override
public PsiElement resolve(@NotNull PsiReference refElement, boolean incompleteCode) {
final PbRefImpl ref = (PbRefImpl) refElement;
final ReferenceKind refKind = ref.getRefKind();
final PbRef qualifier = ref.getQualifierRef();
switch (refKind) {
case FILE: {
//todo
final String relativePath = PbTextUtil.trim(ref.getText(),'\"');