code: function (domObject, toCheck) {
              var
                  classNames,
                  len,
                  idx;
              if ("string" === typeof toCheck) {
                  toCheck = [toCheck];
              }
              _gpfAssert(toCheck instanceof Array, "Expected array");
              classNames = domObject.className.split(" ");
              len = toCheck.length;
              for (idx = 0; idx < len; ++idx) {
                  if (undefined !== gpf.test(classNames, toCheck[idx])) {
                      return true;
                  }
              }
              return false;
          }
docs: Check if the DOM object has the requested class name(s)
  
  @param {Object} domObject
  @param {String|String[]} toCheck
  @gpf:chainable