anchor.diff:      Obj obj = new Obj.fromString(objURL, objString,
           defaultName: "noname",
           fillMissingTextCoord: true,
  -        printStats: true,
  -        debugPrintParts: true);
  +        printStats: true);
       
       String mtlURL = obj.mtllib;
   
  
positive.code: """;
  
  Stats stats;
  
  void main() {
    log("main: begin");
  
negative.code:   gameLoop.start();
  }
  
  void updateCulling(RenderingContext gl, bool culling) {
    if (culling) {
      log("backface culling: ON");
  
      gl.frontFace(RenderingContext.CCW);
      gl.cullFace(RenderingContext.BACK);
      gl.enable(RenderingContext.CULL_FACE);
      return;
    }
  
    log("backface culling: OFF");
    gl.disable(RenderingContext.CULL_FACE);
  }
  
  int get ext_get_element_type {
    if (ext_element_uint) {
      return RenderingContext.UNSIGNED_INT;
    }
  
    return RenderingContext.UNSIGNED_SHORT;
  }
  
  void detect_element_uint(RenderingContext gl) {
    String extName = "OES_element_index_uint";
    OesElementIndexUint ext;
  
    try {
      ext = gl.getExtension(extName);
    } catch (exc) {
      log("gl.getExtension('$extName') exception: $exc");
    }
  
    ext_element_uint = ext != null;
  
    log("gl.getExtension('$extName'): available = $ext_element_uint");
  }
  
  
  void fetchObj(String objURL) {
    
    void handleObjResponse(String objString) {
  