docs: protected final void _writePPFieldName(String name, boolean commaBefore)
          throws IOException, JsonGenerationException
      {
          if (commaBefore) {
              _cfgPrettyPrinter.writeObjectEntrySeparator(this);
          } else {
              _cfgPrettyPrinter.beforeObjectEntries(this);
          }
  
          if (isEnabled(Feature.QUOTE_FIELD_NAMES)) { // standard
              if (_outputTail >= _outputEnd) {
                  _flushBuffer();
              }
              _outputBuffer[_outputTail++] = '"';
              _writeString(name);
              if (_outputTail >= _outputEnd) {
                  _flushBuffer();
              }
              _outputBuffer[_outputTail++] = '"';
          } else { // non-standard, omit quotes
              _writeString(name);
          }
      }