@java.lang.Override
    public boolean hasExpirationDate() {
        return ((bitField0_ & 0x00000010) != 0);
    }
<code>optional int64 expiration_date = 5;</code>

@return Whether the expirationDate field is set.
turms-client-kotlin/src/main/java/im/turms/client/model/proto/model/group/GroupJoinRequest.java