function getStrings() {
    const ctcMessage = {
      message: 'Need absolute URL ($ICU_0$)',
      description: 'Explanatory message.',
      placeholders: {
        ICU_0: {
          content: '{url}',
          example: 'https://example.com/',
        },
      },
    };

    return {
      first: deepClone(ctcMessage),
      second: deepClone(ctcMessage),
      third: deepClone(ctcMessage),
    };
  }
@return {Record<'first'|'second'|'third', CtcWithPlaceholders>}