@java.lang.Override
    public void writeTo(com.google.protobuf.CodedOutputStream output) throws java.io.IOException {
      if (!com.google.protobuf.GeneratedMessageV3.isStringEmpty(inputKey_)) {
        com.google.protobuf.GeneratedMessageV3.writeString(output, 1, inputKey_);
      }
      getUnknownFields().writeTo(output);
    }
<pre>
The
[InputAttachment.key][google.cloud.video.livestream.v1.InputAttachment.key]
of the input to switch to.
</pre>

<code>string input_key = 1;</code>

@return The bytes for inputKey.
java-video-live-stream/proto-google-cloud-live-stream-v1/src/main/java/com/google/cloud/video/livestream/v1/Event.java