private void ensureTrackSidsIsMutable() {
            if (!trackSids_.isModifiable()) {
                trackSids_ = new com.google.protobuf.LazyStringArrayList(trackSids_);
            }
            bitField0_ |= 0x00000004;
        }
<code>string identity = 2;</code>

@param value The bytes for identity to set.
@return This builder for chaining.
turms-plugins/turms-plugin-livekit/src/main/java/im/turms/plugin/livekit/core/proto/room/UpdateSubscriptionsRequest.java