platform.apilevel

String value describing the current API version.
Its value can be :

• "1.0" for OS versions 3.0 and 3.1
• "2.0" for OS 3.2
• "2.2" for OS 3.4 (iPad App)
• "2.3" for OS 3.6
• "2.4" for OS 3.9
• "2.5" for OS 3.11 (iPad App)
• "2.6" for OS 4.0 and 4.1 (iPad App)
• "2.7" for OS 4.2 and later (including the CX II's OS)

Manually setting this property has to be done at the top of the lua script and can only be done once.

Setting a unsupported apilevel has different behaviours when in < 3.6 and >= 3.6:
Before 3.6: The highest supported will be loaded.
With and after 3.6: The highest supported below the requested API level supported will be loaded. But requesting an API level below platform.apilevel = '1.0' will result in the latest/current apilevel available.