private void setDeliveryDate(long value) {
        bitField0_ |= 0x00000002;
        deliveryDate_ = value;
    }
<code>optional int64 delivery_date = 2;</code>

@param value The deliveryDate to set.
turms-client-kotlin/src/main/java/im/turms/client/model/proto/model/message/Message.java