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

            postReposterItems = items
        case .postComments:
            postCommentItems = items
        case .postSocialPadding:
            postSocialPaddingItems = items
        case .postCommentBar:

                }

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

                it("replaces the appropriate placeholders") {
