docs: function(contextObj, options) {
          var context = this._parseContext(contextObj);
          var subKey = options.applySubstitutions !== false ? 'subbed': 'unsubbed';
          var collector = this.masterDelta ? [this.masterDelta[subKey]] : [];
          this._readNoMergeHelper(this.tree, 0, context, collector, subKey);
          return cloneDeep(collector);
      }