code: function format(err, options) {
      const error = { message: 'Internal Server Error' };
  
      options = options || {};
  
      if (options.exposeErrors || (err.httpStatusCode && err.httpStatusCode < 500)) {
          error.message = err.message;
          if (err.code) error.code = err.code;
          if (err.validation) error.validation = err.validation;
      }
  
      if (options.exposeErrors) {
          if (err.stack) error.stack = err.stack.split(/\r?\n/);
  
          if (err.info) {
              Object.keys(err.info).forEach(key => {
                  if (!has(error, key) && has(err.info, key)) error[key] = err.info[key];
              });
          }
      }
  
      return error;
  }
docs: Converts an error object to a stringifyable object format for use
  in Flora responses.
  
  @param {FloraError} err object
  @param {Object=} options