Fix launchPagingStore

cache/src/commonMain/kotlin/org/mobilenativefoundation/store/cache5/StoreMultiCache.kt

@@ -2,6 +2,7 @@
 
 package org.mobilenativefoundation.store.cache5
 
+import org.mobilenativefoundation.store.core5.ExperimentalStoreApi
 import org.mobilenativefoundation.store.core5.KeyProvider
 import org.mobilenativefoundation.store.core5.StoreData
 import org.mobilenativefoundation.store.core5.StoreKey
@@ -12,6 +13,7 @@ import org.mobilenativefoundation.store.core5.StoreKey
  * Depends on [StoreMultiCacheAccessor] for internal data management.
  * @see [Cache].
  */
+@OptIn(ExperimentalStoreApi::class)
 class StoreMultiCache<Id : Any, Key : StoreKey<Id>, Single : StoreData.Single<Id>, Collection : StoreData.Collection<Id, Single>, Output : StoreData<Id>>(
     private val keyProvider: KeyProvider<Id, Single>,
     singlesCache: Cache<StoreKey.Single<Id>, Single> = CacheBuilder<StoreKey.Single<Id>, Single>().build(),

core/src/commonMain/kotlin/org/mobilenativefoundation/store/core5/StoreKey.kt

@@ -12,7 +12,7 @@ interface StoreKey<out Id : Any> {
     /**
      * Represents a key for fetching an individual item.
      */
-    interface Single<Id : Any> : StoreKey<Id> {
+    interface Single<out Id : Any> : StoreKey<Id> {
         val id: Id
     }
 

paging/src/commonMain/kotlin/org/mobilenativefoundation/store/paging5/Joiner.kt

@@ -0,0 +1,10 @@
+package org.mobilenativefoundation.store.paging5
+
+import org.mobilenativefoundation.store.core5.ExperimentalStoreApi
+import org.mobilenativefoundation.store.core5.StoreData
+import org.mobilenativefoundation.store.core5.StoreKey
+
+@ExperimentalStoreApi
+interface Joiner<Id : Any, K : StoreKey<Id>, SO : StoreData.Single<Id>> {
+    suspend operator fun invoke(data: Map<K, PagingData<Id, SO>>): PagingData<Id, SO>
+}

paging/src/commonMain/kotlin/org/mobilenativefoundation/store/paging5/KeyFactory.kt

@@ -0,0 +1,9 @@
+package org.mobilenativefoundation.store.paging5
+
+import org.mobilenativefoundation.store.core5.ExperimentalStoreApi
+import org.mobilenativefoundation.store.core5.StoreKey
+
+@ExperimentalStoreApi
+interface KeyFactory<Id : Any, SK : StoreKey.Single<Id>> {
+    fun createFor(id: Id): SK
+}