ModExtraAssets is no longer getting updated for classic. However, since 2024 there's a MEA Revamped version that fits BepInEx moddding BB+ perfectly!
string GetSubDirectory(string dir)
Used to get the location of sub folder, located at "ModExtraAssets" folder in the game folder
using System;
using UnityEngine;
public class Example : MonoBehaviour
{
public string meshesPath;
private void Start()
{
meshesPath = ModExtraAssets.GetSubDirectory("Mesh");
}
}