public override void OnInspectorGUI()
{
    s_Styles = (s_Styles ?? new Styles());
    SyncPlatformSettings();
    base.serializedObject.Update();
    HandleCommonSettingUI();
    GUILayout.Space(5f);
    if (AllTargetsAreVariant())
    {
        HandleVariantSettingUI();
    }
    else if (AllTargetsAreMaster())
    {
        HandleMasterSettingUI();
    }
    GUILayout.Space(5f);
    HandleTextureSettingUI();
    GUILayout.Space(5f);
    if (base.targets.Length == 1 && AllTargetsAreMaster())
    {
        HandlePackableListUI();
    }
    if (EditorSettings.spritePackerMode == SpritePackerMode.BuildTimeOnlyAtlas || EditorSettings.spritePackerMode == SpritePackerMode.AlwaysOnAtlas)
    {
        if (GUILayout.Button(s_Styles.packButton, GUILayout.ExpandWidth(expand: false)))
        {
            SpriteAtlas[] array = new SpriteAtlas[base.targets.Length];
            for (int i = 0; i < array.Length; i++)
            {
                array[i] = (SpriteAtlas)base.targets[i];
            }
            SpriteAtlasUtility.PackAtlases(array, EditorUserBuildSettings.activeBuildTarget);
            SyncPlatformSettings();
            GUIUtility.ExitGUI();
        }
    }
    else if (GUILayout.Button(s_Styles.disabledPackLabel, EditorStyles.helpBox))
    {
        SettingsService.OpenProjectSettings("Project/Editor");
    }
    base.serializedObject.ApplyModifiedProperties();
}