UnityEditor.HierarchyProperty.Reset C# (CSharp) Method

        public extern void Reset();
        internal void SetSearchFilter(SearchFilter filter)

        private void ReadAssetDatabase(string assetFolderRootPath, TreeViewItem parent, int baseDepth)
        {
            // Read from Assets directory
            IHierarchyProperty property = new HierarchyProperty(assetFolderRootPath);

            property.Reset();

            Texture2D folderIcon      = EditorGUIUtility.FindTexture(EditorResources.folderIconName);
            Texture2D emptyFolderIcon = EditorGUIUtility.FindTexture(EditorResources.emptyFolderIconName);

            List <TreeViewItem> allFolders = new List <TreeViewItem>();

            while (property.Next(null))
            {
                if (property.isFolder)
                {
                    TreeViewItem folderItem = new TreeViewItem(property.instanceID, baseDepth + property.depth, null, property.name);
                    folderItem.icon = property.hasChildren ? folderIcon : emptyFolderIcon;
                    allFolders.Add(folderItem);
                }
            }

            // Fix references
            TreeViewUtility.SetChildParentReferences(allFolders, parent);
        }