'See base class.'

def create_hidden_layers(self, component, hidden_layer_sizes):

    layers = []
    for (index, num_units) in enumerate(hidden_layer_sizes):
        layers.append(dragnn.Layer(component, name=('state_c_%d' % index), dim=num_units))
        layers.append(dragnn.Layer(component, name=('state_h_%d' % index), dim=num_units))
    context_layers = list(layers)
    return (layers, context_layers)
