def METHOD_NAME():
    """Fetch the accumulated profile data.
    :return: :type{ProfileCallNode} or None if there is no data.
    """
    raw_profile_calls = child_accu_stack[0]
    if len(raw_profile_calls) == 0:
        return None
    start_time = raw_profile_calls[0].getStartTime()
    end_time = raw_profile_calls[-1].getEndTime()
    fill_children = _fillInProfileSpaces(start_time, end_time, raw_profile_calls)
    return _ProfileCallNode("", 0, start_time, end_time, fill_children)