     func setPagingConfig(responseConfig: ResponseConfig) {
         self.responseConfig = responseConfig
     }
+
+    func appendComments(_ items: [StreamCellItem]) {
+    }
 }

                    expect(destination.postLoverItems.count) > 0
                    expect(destination.postReposterItems.count) > 0
                    expect(destination.postCommentItems.count) > 0
                    expect(destination.postSocialPaddingItems.count) > 0
                    expect(destination.postCommentBarItems.count) > 0
                    expect(destination.postRelatedPostsItems.count) > 0

                }

                it("sets placeholders") {
                    expect(destination.placeholderItems.count) == 8
                }

                it("replaces the appropriate placeholders") {
