int64_t get_property(const char *property, int64_t default_);
float get_property(const char *property, float default_);
double get_property(const char *property, double default_);
int64_t get_property(const char *property, int64_t default_);
float get_property(const char *property, float default_);
double get_property(const char *property, double default_);