private void ensureParticipantTracksIsMutable() {
            if ((bitField0_ & 0x00000010) == 0) {
                participantTracks_ = new java.util.ArrayList<>(participantTracks_);
                bitField0_ |= 0x00000010;
            }
        }
<pre>
set to true to subscribe, false to unsubscribe from tracks
</pre>

<code>bool subscribe = 4;</code>

@return This builder for chaining.
turms-plugins/turms-plugin-livekit/src/main/java/im/turms/plugin/livekit/core/proto/room/UpdateSubscriptionsRequest.java