CQM.fix_variable-cascade-15a810174ff69666.yaml

---
features:
  - |
    Add ``cascade`` keyword argument to ``ConstrainedQuadraticModel.fix_variable()``
    and ``ConstrainedQuadraticModel.fix_variables()``. These methods also
    now return any variables fixed using the `cascade` keyword argument.
upgrade:
  - |
    ``ConstrainedQuadraticModel.fix_variable()`` and
    ``ConstrainedQuadraticModel.fix_variables()`` now raise a ``ValueError``
    if given a variable not in the model.