def METHOD_NAME(self, run_number=0, solver=None, out_stream=_DEFAULT_OUT_STREAM):
    """
    List solver options for the specified run.
    Parameters
    ----------
    run_number : int
        Run_driver or run_model iteration to inspect.
    solver : str or None
        Pathname of solver (None for all solvers).
    out_stream : file-like object
        Where to send human readable output. Default is sys.stdout.
        Set to None to suppress.
    Returns
    -------
    dict
        {solver: {key: val}}.
    """
    pass