some features

in main.cpp fastest Variant implementation

lib/main/containers/picontainers.cpp

@@ -371,4 +371,7 @@
 * \fn bool PIMapIterator::next()
 * \brief Jump to next entry and return if new position is valid.
 
+* \fn void PIMapIterator::reset()
+* \brief Reset iterator to initial position.
+
  * */