ExtJS4 integration

I was wondering if there is an updated example for using the dhtmlx grid with extjs4? I noticed the example provided uses a very old version of both dhtmlx grid and extjs. I tried dragging the example forward to the current version but seem to be running into some issues that look like they will take quite a lot of research to resolve and figured I sink too much time into the issue I should check if there is an updated example available?

I took another shot at dragging the sample code forward since nobody has provided an alternative, I have most of it figured out except a couple little things:

  1. What is this.grid._ext_renders? I mean, obviously the extjs renderer is being stuffed into there but there is no documentation for this in the API documentation so I am left wondering what are valid values for this field?
  2. What is this.grid._exts?? This gets set to true/false several times throughout the sample code and it seems to be a flag for when the data is being fiddled with manually, but I am wondering, is it still supported in the current version of the grid? Should it still be used in the same way if it is?
  3. In the sample code, there is a line: cfg[4].push(“ext”), then cfg[4] is joined up and passed to this.grid.setColTypes(), however I do not see ext as being a valid value for this in the current documentation, should this have been “txt”??

Unfortunately ExtJS integration is not supported anymore.