void content_nodemeta_deserialize_legacy(std::istream &is,
NodeMetadataList *meta, NodeTimerList *timers,
IItemDefManager *item_def_mgr);
void content_nodemeta_deserialize_legacy(std::istream &is,
NodeMetadataList *meta, NodeTimerList *timers,
IItemDefManager *item_def_mgr);