Add Rx returning equivalents of get and fetch convenience functions

store-rx2/src/main/kotlin/com/dropbox/store/rx2/RxStore.kt

@@ -5,6 +5,8 @@ import com.dropbox.android.external.store4.Store
 import com.dropbox.android.external.store4.StoreBuilder
 import com.dropbox.android.external.store4.StoreRequest
 import com.dropbox.android.external.store4.StoreResponse
+import com.dropbox.android.external.store4.fresh
+import com.dropbox.android.external.store4.get
 import io.reactivex.Completable
 import io.reactivex.Flowable
 import io.reactivex.Maybe
@@ -19,6 +21,7 @@ import kotlinx.coroutines.rx2.asCoroutineDispatcher
 import kotlinx.coroutines.rx2.asFlowable
 import kotlinx.coroutines.rx2.await
 import kotlinx.coroutines.rx2.rxCompletable
+import kotlinx.coroutines.rx2.rxSingle
 
 /**
  * Return a flow for the given key
@@ -147,3 +150,13 @@ fun <Key : Any, Output : Any, NewOutput : Any> StoreBuilder<Key, Output>.withFlo
         deleteAll = deleteAllFun
     )
 }
+
+/**
+ * Helper factory that will return data as a [Single] for [key] if it is cached otherwise will return fresh/network data (updating your caches)
+ */
+fun <Key : Any, Output : Any> Store<Key, Output>.observeGet(key: Key) = rxSingle { this@observeGet.get(key) }
+
+/**
+ * Helper factory that will return fresh data as a [Single] for [key] while updating your caches
+ */
+fun <Key : Any, Output : Any> Store<Key, Output>.observeFresh(key: Key) = rxSingle { this@observeFresh.fresh(key) }