How do I view the source code for a specific algorithm in Multicut?

[liuyx599]

Hello, as an example, the specific function of multicut_kernighan_lin, which I learned and tried to run in pycharm. I'd like to see the source code of its specific algorithm (intuition tells me it's probably a CPP source), but I can't get further into the source code by clicking on kernighanLinFactory. Where can I find it?

def multicut_kernighan_lin(graph, costs, time_limit=None, warmstart=True, **kwargs):
    """ Solve multicut problem with kernighan lin solver.

    Introduced in "An efficient heuristic procedure for partitioning graphs":
    http://xilinx.asia/_hdl/4/eda.ee.ucla.edu/EE201A-04Spring/kl.pdf

    Arguments:
        graph [nifty.graph] - graph of multicut problem
        costs [np.ndarray] - edge costs of multicut problem
        time_limit [float] - time limit for inference in seconds (default: None)
        warmstart [bool] - whether to warmstart with gaec solution (default: True)
    """
    objective = _to_objective(graph, costs)
    solver = objective.kernighanLinFactory(warmStartGreedy=warmstart).create(objective)
    visitor = _get_visitor(objective, time_limit, **kwargs)
    return solver.optimize() if visitor is None else solver.optimize(visitor=visitor)

Also, the function multicut_kernighan_lin references 1970's An efficient heuristic procedure for partitioning graphs, but in practice it defaults to initializing with a greedy strategy (warmStartGreedy= warmstart) , so strictly speaking it is the KLj(Kernighan-Lin algorithm with Joins) algorithm with Joins proposed in "An efficient fusion move algorithm for the minimum cost lifted multicut problem" of 2015 ICCV ?