code: public static Result internalServerError(String content) {
          return status(Result.INTERNAL_SERVER_ERROR).render(content).as(MimeTypes.TEXT);
      }
docs: Generates a new result with the status set to {@literal 500 - INTERNAL SERVER ERROR} with the given text as
  content. The {@literal Content-Type} header is set to {@literal text/plain}.
  
  @param content the content
  @return the new result