this.feedForward();
LogisticRegressionGradient g2 = this.logisticRegressionLayer.getGradient(lr);
MultiLayerGradient ret = new MultiLayerGradient(gradient,g2);
/*
if(multiLayerGradientListeners != null && !multiLayerGradientListeners.isEmpty()) {
for(MultiLayerGradientListener listener : multiLayerGradientListeners) {
listener.onMultiLayerGradient(ret);
}