code: function () {
          var mutations = this.mutations;
  
          // track the change if mutation tracking is enabled
          // do this before deleting the keys
          if (this._postman_enableTracking) {
              this.values.each(function (variable) {
                  mutations.track(MUTATIONS.UNSET, variable.key);
              });
          }
  
          this.values.clear();
      }
docs: Removes *all* variables from the current scope. This is a destructive action.