Optionally disable RequestControllerTypedLink

The RequestControllerTypedLink has the downside of absorbing 'COMPLETE'
events. Especially for subscriptions these can be of interest for the
client to trigger an action, like recreating the subscription.
Allow to disable the RequestControllerTypedLink completely for this
purpose.

Signed-off-by: Julian Scheel <julian@jusst.de>

Author: julianscheel

packages/ferry/lib/ferry.dart

@@ -26,6 +26,7 @@ class Client extends TypedLinkWithCacheAndRequestController {
   final Map<String, Function> updateCacheHandlers;
   final Map<OperationType, FetchPolicy> defaultFetchPolicies;
   final bool addTypename;
+  final bool refetchPaginationSupport;
 
   @override
   late Cache cache;
@@ -45,13 +46,15 @@ class Client extends TypedLinkWithCacheAndRequestController {
     this.updateCacheHandlers = const {},
     this.defaultFetchPolicies = const {},
     this.addTypename = true,
+    this.refetchPaginationSupport = true,
   }) {
     this.cache = cache ??= _defaultCache = Cache();
     this.requestController = requestController ??=
         _defaultRequestController = StreamController.broadcast();
     _typedLink = TypedLink.from([
       ErrorTypedLink(),
-      RequestControllerTypedLink(this.requestController),
+      if (refetchPaginationSupport)
+        RequestControllerTypedLink(this.requestController),
       if (addTypename) AddTypenameTypedLink(),
       if (updateCacheHandlers.isNotEmpty)
         UpdateCacheTypedLink(