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[MenuItem ("Assets/Set Asset Bundle Name")]
static void SetNameSelection()
{
    var objs = Selection.objects;
    foreach (var obj in objs)
    {
        var importer = AssetImporter.GetAtPath(AssetDatabase.GetAssetPath(obj));
        // オブジェクト名をアセットバンドル名として付ける
        importer.assetBundleName = obj.name;
        importer.SaveAndReimport();
    }
}