extern std::string private_key_fingerprint (std::string key);
extern xmlpp::Node* find_child (xmlpp::Node const * node, std::string name);
extern std::string openjpeg_version();
+extern std::string spaces (int n);
+extern void indent (xmlpp::Element* element, int initial);
+extern std::string unique_string (std::list<std::string> existing, std::string base);
}