+ std::vector<NetZone*>* children(); // Sub netzones
+ void hosts(std::vector<s4u::Host*> * whereto); // retrieve my content as a vector of hosts
+
+ /** Get the properties assigned to a host */
+ std::unordered_map<std::string, std::string>* properties();
+
+ /** Retrieve the property value (or nullptr if not set) */
+ const char* property(const char* key);
+ void setProperty(const char* key, const char* value);
+