static Supplier<PsiCodeBlock> forReference(PsiReference ref) {
    if (!(ref instanceof PsiReferenceExpression)) return null;
    PsiMethodCallExpression call = tryCast(((PsiReferenceExpression)ref).getParent(), PsiMethodCallExpression.class);
    return SPECIALIZATIONS.mapFirst(call);
  }
static Supplier<PsiCodeBlock> forReference(PsiReference ref)