result = rb_str_new((char *) dotdb->ptr, dotdb->size);
result = rb_str_new((char *) datablockData(dotdb), datablockSize(dotdb));
static VALUE rbtra_to_dot(VALUE self){  struct TreeAdaptor *ta;  struct DataBlock *dotdb;  volatile VALUE result;  Data_Get_Struct(self, struct TreeAdaptor, ta);  dotdb = convertTreeToDot(ta, 0.0, NULL, NULL, NULL, NULL, NULL);//  datablockWriteToFile(dotdb, maketreecfg->output_tree_fname);  result = rb_str_new((char *) dotdb->ptr, dotdb->size);  datablockFreePtr(dotdb);  return result;}