PsiType (@NotNull PsiIntersectionType intersectionType) { PsiType[] conjuncts = Arrays.stream(intersectionType.getConjuncts()).map(conjunct -> conjunct.accept(this)).toArray(PsiType[]::new); if (ArrayUtil.find(conjuncts, PsiTypes.nullType()) > -1) return PsiTypes.nullType(); return PsiIntersectionType.createIntersection(conjuncts); }