void _minimize(GradientTape tape, OptimizerV2 optimizer, Tensor loss, List <IVariableV1> trainable_variables)
{
var gradients = tape.gradient(loss, trainable_variables);
gradients = optimizer._aggregate_gradients(zip(gradients, trainable_variables));
gradients = optimizer._clip_gradients(gradients);
optimizer.apply_gradients(zip(gradients, trainable_variables.Select(x => x as ResourceVariable)),
experimental_aggregate_gradients: false);
}
