using UnityEngine;
using UnityEditor;
[InitializeOnLoad]
public static class HierarchyHeader
{
    static HierarchyHeader()
    {
        EditorApplication.hierarchyWindowItemOnGUI += HierarchyItem;
    }

    static void HierarchyItem(int instanceID, Rect selectionRect)
    {
        var gameObject = EditorUtility.InstanceIDToObject(instanceID) as GameObject;
        if (gameObject != null)
        {
        var ei = gameObject.GetComponent<EditorItem>();
            if (ei != null) {
                EditorGUI.DrawRect(selectionRect, ei.color);
            }
            if (gameObject.name.StartsWith("---", System.StringComparison.Ordinal)) {
                EditorGUI.DrawRect(selectionRect, Color.gray);
            }
        }
    }
}