Doubt in implementing achievements using SDKBox Play Plugin [Solved]

Hi,
I am trying to integrate achievements using SDKBox Play Plugin for both IOS and android and need to clarify one doubt.

Achievement section on http://docs.sdkbox.com/en/plugins/sdkboxplay/v3-cpp/ suggests that incremental achievements on Game Center do not store its progress whereas incremental achievements on Google Play Services keeps track of its progress.
Considering this difference, how should what value should I pass while calling

 void incrementAchievement(
    const std::string& achievement_name,
    int increment );

From the method name, I feel only the increment value should be passed and not the total progress completed. But when Game Center does not save progress of incremental achievements how will this work ?

Edit :

After going through the header file of PluginSdkboxPlay, I read that the increment value will be added to the current achievement’s value .

Great you solved it.