'**DEPRECATED**: Get a system js helper for the database `database`.
SystemJS will be removed in PyMongo 4.0.'

def __init__(self, database):

    warnings.warn('SystemJS    is    deprecated', DeprecationWarning, stacklevel=2)
    if (not database.write_concern.acknowledged):
        database = database.client.get_database(database.name, write_concern=WriteConcern())
    object.__setattr__(self, '_db', database)
