private void clearIsSystemMessage() {
        bitField0_ &= ~0x00000002;
        isSystemMessage_ = false;
    }
<pre>
is_system_message can only be true if the user is an administrator,
or turms server will return an error
</pre>

<code>optional bool is_system_message = 2;</code>
turms-client-kotlin/src/main/java/im/turms/client/model/proto/request/message/CreateMessageRequest.java