/// <summary>
/// Searches for an element that matches the conditions defined by the specified predicate, and returns the first occurrence within the specified nodes.
/// </summary>
/// <param name="searchNodes">Nodes to search.</param>
/// <param name="match">The Predicate{TItem} delegate that defines the conditions of the element to search for.</param>
/// <returns>The first element that matches the conditions defined by the specified predicate, if found; otherwise, null.</returns>
protected static TreeNode <TItem> FindNode(ObservableList <TreeNode <TItem> > searchNodes, Predicate <TreeNode <TItem> > match)
{
if (searchNodes == null)
{
return(null);
}
var result = searchNodes.Find(match);
if (result != null)
{
return(result);
}
foreach (var node in searchNodes)
{
var subnode = FindNode(node.Nodes, match);
if (subnode != null)
{
return(subnode);
}
}
return(null);
}
