@NotNull
  private static PsiType getCollectionType(@NotNull PsiType psiFieldType, @NotNull PsiManager psiManager) {
    final PsiType elementType = PsiTypeUtil.extractAllElementType(psiFieldType, psiManager);
    return PsiTypeUtil.createCollectionType(psiManager, CommonClassNames.JAVA_UTIL_COLLECTION, elementType);
  }
@NotNull
  private static PsiType getCollectionType(@NotNull PsiType psiFieldType, @NotNull PsiManager psiManager)