code: function(string) {
        if (!string) return "";
        var types = this.typeConfig;
        if (~string.indexOf(types.string.defaultClass)) {
          return _TYPE.STRING;
        } else if (~string.indexOf(types.number.defaultClass)) {
          return _TYPE.NUMBER;
        } else if (~string.indexOf(types.boolean.defaultClass)) {
          return _TYPE.BOOLEAN;
        } else if (~string.indexOf(types.date.defaultClass)) {
          return _TYPE.DATE;
        } else {
          return "";
        }
      }
docs: Get cell data-type
  @param string {String}
  @returns {String} data-type