137    {
  138        if (settings == null)
  139        {
  140            throw new ArgumentNullException("settings");
  141        }
  142        OptimizedInboxTextEncoder innerEncoder;
  143        if (allowMinimalJsonEscaping)
  144        {
  145            ScalarEscaperBase singletonMinimallyEscaped = EscaperImplementation.SingletonMinimallyEscaped;
  146            ref readonly AllowedBmpCodePointsBitmap allowedCodePointsBitmap = ref settings.GetAllowedCodePointsBitmap();
  147            Span<char> span = stackalloc char[2] { '"', '\\' };
  148            innerEncoder = new OptimizedInboxTextEncoder(singletonMinimallyEscaped, in allowedCodePointsBitmap, forbidHtmlSensitiveCharacters: false, span);
  149        }
  150        else
  151        {
  152            ScalarEscaperBase singleton = EscaperImplementation.Singleton;
  153            ref readonly AllowedBmpCodePointsBitmap allowedCodePointsBitmap2 = ref settings.GetAllowedCodePointsBitmap();
  154            Span<char> span = stackalloc char[2] { '\\', '`' };
  155            innerEncoder = new OptimizedInboxTextEncoder(singleton, in allowedCodePointsBitmap2, forbidHtmlSensitiveCharacters: true, span);
  156        }
  158    }
readonly OptimizedInboxTextEncoder _innerEncoder