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Check Map Value Existence

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```
using { /Fortnite.com/Devices }
using { /Verse.org/Simulation }
using { /UnrealEngine.com/Temporary/Diagnostics }

game_device := class(creative_device):

    Map: [int]int = map{}

    OnBegin<override>()<suspends>:void=

        if(not Map[0]). Print("No value")
```
using { /Fortnite.com/Devices } using { /Verse.org/Simulation } using { /UnrealEngine.com/Temporary/Diagnostics } game_device := class(creative_device): Map: [int]int = map{} OnBegin<override>()<suspends>:void= if(not Map[0]). Print("No value")

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