code: function(variant) {
          var eval_array = TL.Date.DATE_PARTS,
              format = "";
  
          for (var i = 0; i < eval_array.length; i++) {
              if ( this.data[eval_array[i]]) {
                  if (variant) {
                      if (!(variant in TL.Date.BEST_DATEFORMATS)) {
                          variant = 'short'; // legacy
                      }
                  } else {
                      variant = 'base'
                  }
                  return TL.Date.BEST_DATEFORMATS[variant][eval_array[i]];
              }
          };
          return "";
      }
docs: /*  Find Best Format
  this may not work with 'cosmologic' dates, or with TL.Date if we
  support constructing them based on JS Date and time
  ==================================================