Conform protocol

Example/Sources/View Controllers/AdvancedExampleViewController.swift

@@ -279,6 +279,19 @@ final class AdvancedExampleViewController: ChatViewController {
         return nil
     }
 
+    override func messageTimestampLabelAttributedText(for message: MessageType, at indexPath: IndexPath) -> NSAttributedString? {
+          let sentDate = message.sentDate
+          let sentDateString = MessageKitDateFormatter.shared.string(from: sentDate)
+          let timeLabelFont: UIFont = .boldSystemFont(ofSize: 10)
+          let timeLabelColor: UIColor
+          if #available(iOS 13, *) {
+              timeLabelColor = .systemGray
+          } else {
+              timeLabelColor = .darkGray
+          }
+          return NSAttributedString(string: sentDateString, attributes: [NSAttributedString.Key.font: timeLabelFont, NSAttributedString.Key.foregroundColor: timeLabelColor])
+      }
+
 }
 
 // MARK: - MessagesDisplayDelegate