code: function processCondition(template, variables, matcher) {
    // eslint-disable-next-line no-constant-condition
    while (true) {
      let matchedCondition = template.match(matcher);
      if (!matchedCondition) {
        break;
      }
  
      let fragment = matchedCondition[0];
      let conditionCode = matchedCondition[1];
  
      let testResult = evaluateCondition(conditionCode, variables);
      let replaceWith = testResult
        ? matchedCondition[2]
        : matchedCondition[3] || '';
  
      template = template.replace(fragment, replaceWith);
    }
  
    return template;
  }
docs: Processes the conditions within the provided template using the provided
  condition matcher regexp.
  
  @param {string} template The template to process.
  @param {Object<string, *>} variables The variables that should be available
  to the predicate expressions in the conditions.
  @param {RegExp} matcher The regexp to use to match the conditions in the
  template.
  @return {string} Processed template.