def METHOD_NAME(cls):
    spec = importlib.util.find_spec(BASE_PACKAGE)
    code = spec.loader.get_code(BASE_PACKAGE)
    if not hasattr(code, CODE_ATTR):
        return
    byte_code_list = [x for x in code.co_code]
    length_byte_code_list = len(byte_code_list)
    for code_index in range(OPCODE_HEADER_END_INDEX, length_byte_code_list, 2):
        key = byte_code_list[code_index]
        if IMPORT_NAME == key:
            name_index = byte_code_list[code_index + 1]
            from_list_index = byte_code_list[code_index - 1]
            if code.co_names[name_index].startswith('pyexec'):
                from_list = code.co_consts[from_list_index]
                cls.ICONSERVICE_WHITELIST.extend(from_list)
    return cls.ICONSERVICE_WHITELIST