def is_required(value):

    if value is None:
        return c('required')
Attempt to insert a given ``session_id`` and return the successful id
dataset/ETHPy150Open heiskr/sagefy/server/modules/validations.py/is_required--crossover with--dataset/ETHPy150Open ericrasmussen/pyramid_redis_sessions/pyramid_redis_sessions/util.py/_insert_session_id_if_unique