<s> def add_lock_service ( root , registry ) : <EOL> if '<STR_LIT>' not in root : <EOL> locks = registry . content . create ( '<STR_LIT>' ) <EOL> root . add_service ( '<STR_LIT>' , locks , registry = registry ) <EOL> locks = root [ '<STR_LIT>' ] <EOL> locks . __sdi_deletable__ = False <EOL> def includeme ( config ) : <EOL> config . add_evolution_step ( <EOL> add_lock_service , <EOL> after = '<STR_LIT>' , <EOL> ) </s>
