/** {@inheritDoc} */
 @Override
 public boolean hasBias() {
   for (final FreeformNeuron neuron : this.neurons) {
     if (neuron.isBias()) {
       return true;
     }
   }
   return false;
 }
 /** {@inheritDoc} */
 @Override
 public int sizeNonBias() {
   int result = 0;
   for (final FreeformNeuron neuron : this.neurons) {
     if (!neuron.isBias()) {
       result++;
     }
   }
   return result;
 }