def perspective_storage_modify(params):
        """Modify a storage unit.

    """
        (su_name, su_args, name, changes) = params
        return container.GetStorage(su_name, *su_args).Modify(name, changes)
    def perspective_storage_execute(params):
        """Execute an operation on a storage unit.

    """
        (su_name, su_args, name, op) = params
        return container.GetStorage(su_name, *su_args).Execute(name, op)
    def perspective_storage_list(params):
        """Get list of storage units.

    """
        (su_name, su_args, name, fields) = params
        return container.GetStorage(su_name, *su_args).List(name, fields)