lib/classes/Variables.js/Variables/renderMatches
class Variables:  renderMatches(value, matches, results) {
    let result = value;
    for (let i = 0; i < matches.length; i += 1) {
      this.warnIfNotFound(matches[i].variable, results[i]);
      result = this.populateVariable(result, matches[i].match, results[i]);
    }
    return result;
  }