UnityEngine.SceneManagement.SceneManager.LoadSceneAsyncNameIndexInternal C# (CSharp) Method

        private static extern AsyncOperation LoadSceneAsyncNameIndexInternal(string sceneName, int sceneBuildIndex, bool isAdditive, bool mustCompleteNextFrame);
        /// <summary>

 public static AsyncOperation LoadSceneAsync(string sceneName, LoadSceneParameters parameters)
 {
     return(SceneManager.LoadSceneAsyncNameIndexInternal(sceneName, -1, parameters, false));
 }