function HistorySync(properties) {
            this.conversations = [];
            this.statusV3Messages = [];
            this.pushnames = [];
            this.recentStickers = [];
            this.pastParticipants = [];
            this.callLogRecords = [];
            this.phoneNumberToLidMappings = [];
            this.accounts = [];
            if (properties)
                for (var keys = Object.keys(properties), i = 0; i < keys.length; ++i)
                    if (properties[keys[i]] != null)
                        this[keys[i]] = properties[keys[i]];
        }
Constructs a new HistorySync.
@memberof proto
@classdesc Represents a HistorySync.
@implements IHistorySync
@constructor
@param {proto.IHistorySync=} [properties] Properties to set