@java.lang.Override
        public boolean hasDeliveryDateStart() {
            return instance.hasDeliveryDateStart();
        }
<code>optional int64 delivery_date_start = 5;</code>

@return Whether the deliveryDateStart field is set.
turms-client-kotlin/src/main/java/im/turms/client/model/proto/request/message/QueryMessagesRequest.java