public Builder clearKind() {
            copyOnWrite();
            instance.clearKind();
            return this;
        }
<pre>
Client -&gt; Server -&gt; Client
</pre>

Protobuf type {@code im.turms.proto.TurmsRequest}
turms-client-kotlin/src/main/java/im/turms/client/model/proto/request/TurmsRequest.java