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) { // ... } }