docs: function (properties) {
          var proto = this.prototype,
              replaceMap = arguments[1] || REPLACE_CLASS_METHODS; // hidden feature, used by itags
          Array.isArray(properties) || (properties=[properties]);
          properties.forEach(function(prop) {
              prop = replaceMap[prop] || prop;
              delete proto[prop];
          });
          return this;
      }