.. start_virtual_graph_deprecation

.. important::

    The *virtual graph* feature is deprecated due to improved calibration of
    newer QPUs: Ocean software's
    :class:`~dwave.system.composites.VirtualGraphComposite` class will be
    removed in a future release. To calibrate chains for residual biases, follow
    the instructions in [Che2023]_.

.. end_virtual_graph_deprecation