Question New trees for terrain (Programmaticaly)

How it infuriates me that the documentation of the unit is very stingy and complicated.

Hi all. I'm doing random terrain generation, I stumbled upon a problem (I don't understand how it works):
There is a terrain, inside the terrain there is a Paint trees tab.

How to programmatically put tree prefabs here? I turned to ChatGpt, he only gave an example with TreeInstance, TreePrototype ... But nowhere is it indicated that the terrain will have the prefab of the tree that I assign to it. I also searched on google and didn't find anything useful.

 

For those who face the same issue
I solved it this way

Code (CSharp):

1.  
2.     TerrainData terrainData = terrain.terrainData;
3.     GameObject[] loadedAssets = Resources.LoadAll<GameObject>("Prefabs/Trees"); //getting tree prefabs from project // folder
4.     List<TreePrototype> treePrototypes = new List<TreePrototype>();
5.  
6.     foreach (GameObject tree in loadedAssets)
7.     {
8.       TreePrototype treePrototype = new TreePrototype();
9.       treePrototype.prefab = tree;
10.       treePrototypes.Add(treePrototype);
11.     }
12.     terrainData.treePrototypes = treePrototypes.ToArray();
13.