UnityEditor.TerrainMenus.GetActiveTerrainData C# (CSharp) Method

        private static TerrainData GetActiveTerrainData()
        {
            if (GetActiveTerrain() != null)
            {
                return GetActiveTerrain().terrainData;
            }
            return null;
        }

 internal static void RefreshPrototypes()
 {
     TerrainMenus.GetActiveTerrainData().RefreshPrototypes();
     TerrainMenus.GetActiveTerrain().Flush();
     EditorApplication.SetSceneRepaintDirty();
 }