public int getDestinationIdentitiesCount() {
            return destinationIdentities_.size();
        }
<pre>
identities of participants who will receive the message (sent to all by default)
</pre>

<code>repeated string destination_identities = 5;</code>

@return The count of destinationIdentities.
turms-plugins/turms-plugin-livekit/src/main/java/im/turms/plugin/livekit/core/proto/models/DataPacket.java