@Test
 public void testBuilder() {
   DianneNeuralNetworkBuilder builder = new DianneNeuralNetworkBuilder("Test");
   builder.addLinear(784, 20);
   builder.addReLU();
   builder.addLinear(20, 10);
   builder.addSoftmax();
   NeuralNetworkDTO nn = builder.create();
   System.out.println(DianneJSONConverter.toJsonString(nn, true));
 }
 @Test
 public void testMLP() {
   NeuralNetworkDTO nn =
       DianneNeuralNetworkBuilder.createMLP("MLP", 784, 10, Activation.Sigmoid, 100, 20);
   System.out.println(DianneJSONConverter.toJsonString(nn, true));
 }