Unity3d MenuItem to create Blend Tree asset

MenuItems.cs

using System.Reflection;
using UnityEditor;
using UnityEditor.Animations;

namespace Plugins.Editor
{
	public static class MenuItems
	{
		[MenuItem("Assets/Create/Blend Tree")]
		private static void CreateBlendTree()
		{
			var asset = new BlendTree();
			MethodInfo _tryGetActiveFolderPath = typeof(ProjectWindowUtil).GetMethod("TryGetActiveFolderPath", BindingFlags.Static | BindingFlags.NonPublic);

			object[] args = new object[] { null };
			bool found = (bool)_tryGetActiveFolderPath.Invoke(null, args);
			string path = (string)args[0];
			if (found)
			{
				path += "/" + $"{ObjectNames.GetUniqueName(new[] { "NewBlendTree" }, "NewBlendTree")}.asset";
				AssetDatabase.CreateAsset(asset, path);
			}
		}
	}
}