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kotlinlang

Out of curiosity, when I call
```single { Repository(get(named("remote")),get(named("local")))```
where is that Repository instance actually stored?
and when I call
```val repo : Reposity by inject```
where is that instance being pulled from again?

is there any interesting magic happening here or is it literally keeping that instance in something like a hashmap?

Looking into the sources it seems like for non scoped modules, they are added <https://github.com/InsertKoinIO/koin/blob/main/core/koin-core/src/commonMain/kotlin/org/koin/core/Koin.kt#L53|here> which happens in the <https://github.com/InsertKoinIO/koin/blob/c954e53959cf982725ca33c9680acb650c63da52/core/koin-core/src/commonMain/kotlin/org/koin/core/Koin.kt#L326-L330|loadModules> which is what’s called from your normal `startKoin { modules(listOf(myModules…))}` then <https://github.com/InsertKoinIO/koin/blob/c954e53959cf982725ca33c9680acb650c63da52/core/koin-core/src/commonMain/kotlin/org/koin/core/registry/InstanceRegistry.kt#L46-L51|this is inside InstanceRegistry>.
Then to resolve it <https://github.com/InsertKoinIO/koin/blob/c954e53959cf982725ca33c9680acb650c63da52/core/koin-core/src/commonMain/kotlin/org/koin/core/registry/InstanceRegistry.kt#L96-L112|does this>, so in short yeah it seems to be in a `safeHashMap` which is of type `MutableMap` which implementation is different depending on the actual platform Kotlin is being compiled for, a <https://github.com/InsertKoinIO/koin/blob/c954e53959cf982725ca33c9680acb650c63da52/core/koin-core/src/jvmMain/kotlin/org/koin/mp/KoinPlatformTools.kt#L21|java.util.concurrent.ConcurrentHashMap> for jvm so also Android as I understand.

ah yes, I forgot about concurrency, although I never thought that concurrency is actually an issue for setting up the DI types.
Probably somewhere out there, somebody is doing something strange with the library that required this or since this is a library, it's better to be safe than getting a ConcurrentModificationException