@@ -0,0 +1,238 @@
+package com.example.rollingball.app;%0A%0Apublic class FieldGameObject extends GameObject%0A%7B%0A  public void generate_simple_plane()%7B throw new NotImplementedException(); %7D%0A  public void load_from_file()%7B throw new NotImplementedException(); %7D%0A%7D

fix #105