chating App in swift

lazy var outgoingBubble: JSQMessagesBubbleImage = {
    return JSQMessagesBubbleImageFactory()!.outgoingMessagesBubbleImage(with: UIColor.jsq_messageBubbleBlue())
}()

lazy var incomingBubble: JSQMessagesBubbleImage = {
    return JSQMessagesBubbleImageFactory()!.incomingMessagesBubbleImage(with: UIColor.jsq_messageBubbleLightGray())
}()