async __getFeedbackMessages(validationResults) {
      let fieldName = await this.fieldName;
      return Promise.all(
        validationResults.map(async ({ validator, outcome }) => {
          if (validator.config.fieldName) {
            fieldName = await validator.config.fieldName;
          }
          // @ts-ignore [allow-protected]
          const message = await validator._getMessage({
            modelValue: this.modelValue,
            formControl: this,
            fieldName,
            outcome,
          });
          return { message, type: validator.type, validator };
        }),
      );
    }
@param {ValidationResultEntry[]} validationResults list of objects having a .getMessage method
@return {Promise.<FeedbackMessage[]>}
@private