def setDefaultKwargs(inKwargs, **kwargs):
    """
    Fill in a dict with a set of default kwargs and return it.

    Parameters
    ----------
    inKwargs: dict
        Input dict to be filled in with the default kwargs.
    **kwargs:
        Default kwargs to be set.

    Returns
    -------
    Dict containing the default kwargs.
    """
    for par, value in kwargs.items():
        if par not in inKwargs.keys():
            inKwargs[par] = value
    return inKwargs