code: public JsonWriter valueLiteral(CharSequence value) {
          startValue();
  
          if (value == null) {
              writer.write(kNull);
          } else {
              writer.write(value.toString());
          }
          return this;
      }
docs: Write a literal string as value. Not quoted and not escaped.
  
  @param value The raw string value.
  @return The JSON Writer.