code: function(obj) {
              if (obj === null || obj === void 0)
                  return false;
  
              return Object(obj) instanceof this || classOf(obj).linearizedTypes.lastIndexOf(this) != -1;
          }
docs: Indicates if the object is an instance of this class
  @param obj The object to check for
  @returns {boolean} <code>true</code> if the object is defined and