static ActorPtr create(const std::string& name, s4u::Host* host, const std::function<void()>& code);
/** Create an actor, but don't start it yet.
*
- * This is usefull to set some properties or extension before actually starting it */
+ * This is useful to set some properties or extension before actually starting it */
static ActorPtr init(const std::string& name, s4u::Host* host);
ActorPtr set_stacksize(unsigned stacksize);
/** Start a previously initialized actor */
