* \param name a property name
* \return value of a property (or NULL if property not set)
*/
-const char* SD_link_get_property_value(SD_link_t link, char* name)
+const char* SD_link_get_property_value(SD_link_t link, const char* name)
{
return xbt_dict_get_or_null(SD_link_get_properties(link), name);
}