public com.google.protobuf.ByteString getInputKeyBytes() {
        java.lang.Object ref = inputKey_;
        if (ref instanceof String) {
          com.google.protobuf.ByteString b =
              com.google.protobuf.ByteString.copyFromUtf8((java.lang.String) ref);
          inputKey_ = b;
          return b;
        } else {
          return (com.google.protobuf.ByteString) ref;
        }
      }
<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