private void ensureUrlsIsMutable() {
            if (!urls_.isModifiable()) {
                urls_ = new com.google.protobuf.LazyStringArrayList(urls_);
            }
            bitField0_ |= 0x00000002;
        }
<pre>
required
</pre>

<code>.livekit.StreamProtocol protocol = 1;</code>

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