def METHOD_NAME(self):
    """
    Returns the QUBO encoding of this problem.
    Returns
    -------
        The QUBO encoding of this problem.
    """
    cplex_model = self.docplex_model
    n_vars = cplex_model.number_of_binary_variables
    qubo_docplex = FromDocplex2IsingModel(cplex_model, multipliers=self.penalty)
    ising_model = qubo_docplex.ising_model
    return QUBO(
        n_vars,
        ising_model.terms + [[]],
        ising_model.weights + [ising_model.constant],
        self.problem_instance,
    )