code: function month(options) {
      var content = ''
        , m = this.month;
  
      while(++m <= 12) {
        content += options.fn({
          month: m,
          selected: +this.expiration_month === m ? ' selected' : '',
          fullMonth: this.months[m - 1]
        });
      }
  
      return content;
    }
docs: Handblebar helper to generate month dropdown select options.
  
  @param {Object} options
  @return {String} generated template
  @api private