def METHOD_NAME(self, app_config: CFG) -> None:
    """
    load config for caldav related stuff
    """
    app_config.CALDAV__RADICALE_PROXY__BASE_URL = app_config.get_raw_config(
        "caldav.radicale_proxy.base_url", "http://localhost:5232"
    )
    default_caldav_storage_dir = app_config.here_macro_replace("%(here)s/radicale_storage")
    app_config.CALDAV__RADICALE__STORAGE__FILESYSTEM_FOLDER = app_config.get_raw_config(
        "caldav.radicale.storage.filesystem_folder", default_caldav_storage_dir
    )
    app_config.CALDAV__PRE_FILLED_EVENT__DESCRIPTION_FILE_PATH = app_config.get_raw_config(
        "caldav.pre_filled_event.description_file_path",
        "",
    )
    # INFO - G.M - 2021-12-07 - internal config param to configure installed agenda hierarchy
    app_config.RADICALE__CALENDAR_DIR = "agenda"
    app_config.RADICALE__ADDRESSBOOK_DIR = "addressbook"
    app_config.RADICALE__USER_RESOURCE_DIR_PATTERN = "user_{user_id}"
    app_config.RADICALE__USER_RESOURCE_PATTERN = "{owner_type}_{owner_id}_{resource_type}"
    app_config.RADICALE__WORKSPACE_SUBDIR = "workspace"
    app_config.RADICALE__USER_SUBDIR = "user"
    app_config.RADICALE__LOCAL_PATH_STORAGE = "{}/{}".format(
        app_config.CALDAV__RADICALE__STORAGE__FILESYSTEM_FOLDER, "collection-root"
    )
    # Path:
    app_config.RADICALE__WORKSPACE_AGENDA_PATH_PATTERN = (
        "/{resource_type_dir}/{workspace_subdir}/{workspace_id}"
    )
    app_config.RADICALE__USER_AGENDA_PATH_PATTERN = (
        "/{resource_type_dir}/{user_subdir}/{user_id}"
    )
    app_config.RADICALE__USER_RESOURCE_PATH_PATTERN = "/{user_resource_dir}/{user_resource}"