UnityEditor.TerrainEditorUtility.RemoveDetail C# (CSharp) Method

        internal static void RemoveDetail(Terrain terrain, int index)
        {
            TerrainData terrainData = terrain.terrainData;
            if (terrainData != null)
            {
                Undo.RegisterCompleteObjectUndo(terrainData, "Remove detail object");
                terrainData.RemoveDetailPrototype(index);
            }
        }

 internal static void RemoveDetail(MenuCommand item)
 {
     TerrainEditorUtility.RemoveDetail((Terrain)item.context, item.userData);
 }