MessageReceipt constructor
MessageReceipt({})
Constructs a new MessageReceipt instance.
Requires messageId, sender, receiverType, receiverId, timestamp,
receiptType, deliveredAt, and readAt to be specified.
Implementation
MessageReceipt(
{required this.messageId,
required this.sender,
required this.receiverType,
required this.receiverId,
required this.timestamp,
required this.receiptType,
required this.deliveredAt,
required this.readAt});