[Where can I get more tutorials]

I have seen the tutorial on the official website. Where can I find more about leadworks c++

[How to get entities?]

26 minutes ago, gamecreator said:

You can use world:GetEntity() to get each one.  There's an example using it here: https://www.leadwerks.com/community/blogs/entry/1866-common-bottlenecks/page/2/?tab=comments#comment-8055

Thank you very much, but why didn't these functions appear in the official doc? And that doc brought me some confusion.

[How to get entities?]

How to get root's all entities? I didn't find it in the API. Is there such a function? I use Lua for the time being，Everybody help