lastMessageAttachment property Null safety
@JsonKey(fromJson: NIMMessageAttachment._fromMap, toJson: NIMMessageAttachment._toMap), final
If the most recent message belongs to the extended type, get the attachment of the message.
You can define custom brief text for messages in the recent message list.
Implementation
@JsonKey(
fromJson: NIMMessageAttachment._fromMap,
toJson: NIMMessageAttachment._toMap)
final NIMMessageAttachment? lastMessageAttachment;