text: /**
   * given two integers, returns their sum
   * @param {number} x
   * @param {number} y
   * @returns number
   */
  exports.add = (x,y) => {
      if([x,y].some(val => typeof val !== 'number')) {
          throw new Error('`Add` can only accept number values');
      }
      return x + y
  };
  