@java.lang.Override
    public boolean hasResponderId() {
        return ((bitField0_ & 0x00000080) != 0);
    }
<code>optional int64 responder_id = 8;</code>

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