void OnEnable()
{
#if UNITY_2019_1_OR_NEWER
m_Root = rootVisualElement;
m_Root.styleSheets.Add(AssetDatabase.LoadAssetAtPath <StyleSheet>(Resources.GetStyleSheetPath("AssetTablesWindow")));
#else
m_Root = this.GetRootVisualContainer();
m_Root.AddStyleSheetPath(Resources.GetStyleSheetPath("AssetTablesWindow"));
#endif
var template = Resources.GetTemplate("AssetTablesWindow");
m_Root.Add(template);
template.StretchToParentSize();
SetupPanels();
}
