ScriptedImporterAttribute.version

설명

Importer version number that is used by the import layer to detect new version of the importer and trigger re-imports when such events occur, to apply latest changes made to the scripted imrpoter.

using UnityEngine;
using UnityEditor.AssetImporters;

[ScriptedImporter(1, "sphere")]
public class SphereImporter : ScriptedImporter
{
    public override void OnImportAsset(AssetImportContext ctx)
    {
        // ...
    }
}