def METHOD_NAME():
    sdk_version_prefix = ''
    if _is_on_app_service() and _is_attach_enabled():
        os = 'u'
        system = platform.system()
        if system == "Linux":
            os = 'l'
        elif system == "Windows":
            os = 'w'
        sdk_version_prefix = "a{}_".format(os)
    return sdk_version_prefix