rivate static boolean validateBuilderIdentifier(@NotNull String builderClassName,
                                                   @NotNull Project project,
                                                   @NotNull ProblemSink builder) {
    final PsiNameHelper psiNameHelper = PsiNameHelper.getInstance(project);
    if (!psiNameHelper.isIdentifier(builderClassName)) {
      builder.addErrorMessage("inspection.message.s.not.valid.identifier", builderClassName);
      return false;
    }
    return true;
  }

rivate static boolean validateBuilderIdentifier(@NotNull String builderClassName,
                                                   @NotNull Project project,
                                                   @NotNull ProblemSink builder) 