The type of compression the archive uses.
        Only accessible if the archive loaded successfully.
                    See Also: AssetBundles compression.
                
      
                        
using Unity.Content;
using Unity.IO.Archive;
using UnityEditor;
using UnityEngine;
public static class ArchiveUtilities
{
#if UNITY_EDITOR
    [MenuItem("Debug/Check Archive Compression")]
    static public void CheckCompression()
    {
        string archivePath = EditorUtility.OpenFilePanel("Pick AssetBundle or other Unity Archive file", "", "");
        if (archivePath.Length == 0)
            return;
        Debug.Log($"Bundle {archivePath} has compression type {GetArchiveCompression(archivePath)}");
    }
#endif
    static public UnityEngine.CompressionType GetArchiveCompression(string archivePath)
    {
        var archiveHandle = ArchiveFileInterface.MountAsync(ContentNamespace.Default, archivePath, "temp:");
        archiveHandle.JobHandle.Complete();
        if (archiveHandle.Status == ArchiveStatus.Failed)
            throw new System.ArgumentException($"Failed to load {archivePath}");
        var compression = archiveHandle.Compression;
        archiveHandle.Unmount().Complete();
        return compression;
    }
}