private void FromDirectory_Nodes(string dir, bool jsonMode) {
if (jsonMode && File.Exists(Path.Combine(dir, "model.json"))) {
RootNode = FromNodesJson(Path.Combine(dir, "model.json"));
} else {
RootNode = null;
}
NodesBytes = File.ReadAllBytes(Path.Combine(dir, "model.bin"));
}
}