     private func commonInit() {
         self.translatesAutoresizingMaskIntoConstraints = false
         self.layer.masksToBounds = true
-        self.layer.cornerRadius = Constants.cornerRadius
+        self.layer.cornerRadius = BubbleRoomCellLayoutConstants.bubbleCornerRadius
     }
     
     // MARK: - Public

import UIKit

class RoomMessageBubbleBackgroundView: UIView {
    
    // MARK: - Constant
    
    private enum Constants {
        static let cornerRadius: CGFloat = 12.0
    }
    
    // MARK: - Properties
    

        
        self.removeTimestampView()
        
        self.addTimestampView(timestampView, rightMargin: BubbleRoomCellLayoutConstants.bubbleTimestampViewMargins.right, bottomMargin: BubbleRoomCellLayoutConstants.bubbleTimestampViewMargins.bottom)
        self.timestampView = timestampView
    }
    
