code: function _contextNext() {
  
          // Get the next node from the sequence
          if (!this._contextState.nextSequence) {
              return undefined;
          }
          if (this._context.reverse) {
              this._contextState.nextSequence = this._contextState.nextSequence.getNext();
              if (!this._contextState.nextSequence) {
                  return undefined;
              }
          }
          var renderNode = this._contextState.nextSequence.get();
          if (!renderNode) {
              this._contextState.nextSequence = undefined;
              return undefined;
          }
          var nextSequence = this._contextState.nextSequence;
          if (!this._context.reverse) {
              this._contextState.nextSequence = this._contextState.nextSequence.getNext();
          }
          if (this._contextState.lastRenderNode === renderNode) {
            throw 'ViewSequence is corrupted, should never contain the same renderNode twice, index: ' + nextSequence.getIndex();
          }
          this._contextState.lastRenderNode = renderNode;
          return {
              renderNode: renderNode,
              viewSequence: nextSequence,
              next: true,
              index: ++this._contextState.nextGetIndex
          };
      }
docs: Get the next render-node