def add_route_parts_into(failure, into):
    """
    Adds route parts into the given list.
    
    Parameters
    ----------
    failure : ``FailureBase``
        The parent failure to get route of.
    into : `list` of `str`
        A list to put the string parts into.
    
    Returns
    -------
    into : `list` of `str`
    """
    case = failure.handle.case
    
    into.append(case.import_route)
    into.append('.')
    into.append(case.name)
    
    return into