public Builder clearRegion() {
            region_ = getDefaultInstance().getRegion();
            bitField0_ &= ~0x00000200;
            onChanged();
            return this;
        }
<code>string region = 12;</code>

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